36656639 has 2 divisors, whose sum is σ = 36656640. Its totient is φ = 36656638.

The previous prime is 36656629. The next prime is 36656647. The reversal of 36656639 is 93665663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36656639 - 2⁴ = 36656623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36656639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36656629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18328319 + 18328320.

It is an arithmetic number, because the mean of its divisors is an integer number (18328320).

Almost surely, 2^36656639 is an apocalyptic number.

36656639 is a deficient number, since it is larger than the sum of its proper divisors (1).

36656639 is an equidigital number, since it uses as much as digits as its factorization.

36656639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 44.

The square root of 36656639 is about 6054.4726442523. The cubic root of 36656639 is about 332.1882098034.

The spelling of 36656639 in words is "thirty-six million, six hundred fifty-six thousand, six hundred thirty-nine".