135291657 has 16 divisors (see below), whose sum is σ = 186621440. Its totient is φ = 87091200.

The previous prime is 135291643. The next prime is 135291679. The reversal of 135291657 is 756192531.

It is not a de Polignac number, because 135291657 - 2¹⁰ = 135290633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135291617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48969 + ... + 51657.

It is an arithmetic number, because the mean of its divisors is an integer number (11663840).

Almost surely, 2^135291657 is an apocalyptic number.

It is an amenable number.

135291657 is a deficient number, since it is larger than the sum of its proper divisors (51329783).

135291657 is a wasteful number, since it uses less digits than its factorization.

135291657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264.

The product of its digits is 56700, while the sum is 39.

The square root of 135291657 is about 11631.4941860451. The cubic root of 135291657 is about 513.3619452859.

The spelling of 135291657 in words is "one hundred thirty-five million, two hundred ninety-one thousand, six hundred fifty-seven".