133137657 has 12 divisors (see below), whose sum is σ = 192424960. Its totient is φ = 88705368.

The previous prime is 133137649. The next prime is 133137661. The reversal of 133137657 is 756731331.

It is a happy number.

It is not a de Polignac number, because 133137657 - 2³ = 133137649 is a prime.

It is a super-2 number, since 2×133137657² = 35451271422899298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133137647) 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, 16848 + ... + 23454.

Almost surely, 2^133137657 is an apocalyptic number.

It is an amenable number.

133137657 is a deficient number, since it is larger than the sum of its proper divisors (59287303).

133137657 is a wasteful number, since it uses less digits than its factorization.

133137657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8852 (or 8849 counting only the distinct ones).

The product of its digits is 39690, while the sum is 36.

The square root of 133137657 is about 11538.5292390322. The cubic root of 133137657 is about 510.6229182069.

Adding to 133137657 its reverse (756731331), we get a palindrome (889868988).

The spelling of 133137657 in words is "one hundred thirty-three million, one hundred thirty-seven thousand, six hundred fifty-seven".