3656537 has 2 divisors, whose sum is σ = 3656538. Its totient is φ = 3656536.

The previous prime is 3656509. The next prime is 3656539. The reversal of 3656537 is 7356563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 80656 = 1891^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656537 - 2⁸ = 3656281 is a prime.

Together with 3656539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3656497 and 3656506.

It is not a weakly prime, because it can be changed into another prime (3656539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828268 + 1828269.

It is an arithmetic number, because the mean of its divisors is an integer number (1828269).

Almost surely, 2^3656537 is an apocalyptic number.

It is an amenable number.

3656537 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656537 is an equidigital number, since it uses as much as digits as its factorization.

3656537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 35.

The square root of 3656537 is about 1912.2073632323. The cubic root of 3656537 is about 154.0600345009.

The spelling of 3656537 in words is "three million, six hundred fifty-six thousand, five hundred thirty-seven".