133673805 has 24 divisors (see below), whose sum is σ = 245332152. Its totient is φ = 67098624.

The previous prime is 133673801. The next prime is 133673809. The reversal of 133673805 is 508376331.

It is an interprime number because it is at equal distance from previous prime (133673801) and next prime (133673809).

It can be written as a sum of positive squares in 4 ways, for example, as 63968004 + 69705801 = 7998^2 + 8349^2 .

It is not a de Polignac number, because 133673805 - 2² = 133673801 is a prime.

It is a super-2 number, since 2×133673805² = 35737372286356050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133673805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133673801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86604 + ... + 88133.

It is an arithmetic number, because the mean of its divisors is an integer number (10222173).

Almost surely, 2^133673805 is an apocalyptic number.

133673805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133673805 is a deficient number, since it is larger than the sum of its proper divisors (111658347).

133673805 is a wasteful number, since it uses less digits than its factorization.

133673805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174765 (or 174762 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 133673805 is about 11561.7388398113. The cubic root of 133673805 is about 511.3074297388.

The spelling of 133673805 in words is "one hundred thirty-three million, six hundred seventy-three thousand, eight hundred five".