133497983 has 4 divisors (see below), whose sum is σ = 133524888. Its totient is φ = 133471080.

The previous prime is 133497979. The next prime is 133497989. The reversal of 133497983 is 389794331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133497983 - 2² = 133497979 is a prime.

It is a super-2 number, since 2×133497983² = 35643422930136578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133497989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608 + ... + 16733.

It is an arithmetic number, because the mean of its divisors is an integer number (33381222).

Almost surely, 2^133497983 is an apocalyptic number.

133497983 is a deficient number, since it is larger than the sum of its proper divisors (26905).

133497983 is an equidigital number, since it uses as much as digits as its factorization.

133497983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26904.

The product of its digits is 489888, while the sum is 47.

The square root of 133497983 is about 11554.1327238352. The cubic root of 133497983 is about 511.0831560832.

The spelling of 133497983 in words is "one hundred thirty-three million, four hundred ninety-seven thousand, nine hundred eighty-three".