133640077 has 4 divisors (see below), whose sum is σ = 141501276. Its totient is φ = 125778880.

The previous prime is 133640071. The next prime is 133640093. The reversal of 133640077 is 770046331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 107619876 + 26020201 = 10374^2 + 5101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133640077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133640071) 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 3 ways as a sum of consecutive naturals, for example, 3930574 + ... + 3930607.

It is an arithmetic number, because the mean of its divisors is an integer number (35375319).

Almost surely, 2^133640077 is an apocalyptic number.

133640077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

133640077 is a deficient number, since it is larger than the sum of its proper divisors (7861199).

133640077 is an equidigital number, since it uses as much as digits as its factorization.

133640077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861198.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 133640077 is about 11560.2801436643. The cubic root of 133640077 is about 511.2644224903.

The spelling of 133640077 in words is "one hundred thirty-three million, six hundred forty thousand, seventy-seven".