135902537 has 2 divisors, whose sum is σ = 135902538. Its totient is φ = 135902536.

The previous prime is 135902479. The next prime is 135902549. The reversal of 135902537 is 735209531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134189056 + 1713481 = 11584^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 135902537 - 2⁸ = 135902281 is a prime.

It is equal to p_7693532 and since 135902537 and 7693532 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 135902497 and 135902506.

It is not a weakly prime, because it can be changed into another prime (135902587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67951268 + 67951269.

It is an arithmetic number, because the mean of its divisors is an integer number (67951269).

Almost surely, 2^135902537 is an apocalyptic number.

It is an amenable number.

135902537 is a deficient number, since it is larger than the sum of its proper divisors (1).

135902537 is an equidigital number, since it uses as much as digits as its factorization.

135902537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 135902537 is about 11657.7243491172. The cubic root of 135902537 is about 514.1334432758.

The spelling of 135902537 in words is "one hundred thirty-five million, nine hundred two thousand, five hundred thirty-seven".