133699657 has 24 divisors (see below), whose sum is σ = 170520896. Its totient is φ = 102078144.

The previous prime is 133699651. The next prime is 133699661. The reversal of 133699657 is 756996331.

It is not a de Polignac number, because 133699657 - 2³ = 133699649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133699657.

It is not an unprimeable number, because it can be changed into a prime (133699651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75658 + ... + 77404.

Almost surely, 2^133699657 is an apocalyptic number.

It is an amenable number.

133699657 is a deficient number, since it is larger than the sum of its proper divisors (36821239).

133699657 is a wasteful number, since it uses less digits than its factorization.

133699657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1796 counting only the distinct ones).

The product of its digits is 918540, while the sum is 49.

The square root of 133699657 is about 11562.8567836846. The cubic root of 133699657 is about 511.3403892445.

The spelling of 133699657 in words is "one hundred thirty-three million, six hundred ninety-nine thousand, six hundred fifty-seven".