133497657 has 12 divisors (see below), whose sum is σ = 193529700. Its totient is φ = 88675488.

The previous prime is 133497649. The next prime is 133497673. The reversal of 133497657 is 756794331.

It can be written as a sum of positive squares in 2 ways, for example, as 8415801 + 125081856 = 2901^2 + 11184^2 .

It is not a de Polignac number, because 133497657 - 2³ = 133497649 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (133497677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24282 + ... + 29267.

It is an arithmetic number, because the mean of its divisors is an integer number (16127475).

Almost surely, 2^133497657 is an apocalyptic number.

It is an amenable number.

133497657 is a deficient number, since it is larger than the sum of its proper divisors (60032043).

133497657 is a wasteful number, since it uses less digits than its factorization.

133497657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53832 (or 53829 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 133497657 is about 11554.1186163203. The cubic root of 133497657 is about 511.0827400639.

The spelling of 133497657 in words is "one hundred thirty-three million, four hundred ninety-seven thousand, six hundred fifty-seven".