37656401 has 2 divisors, whose sum is σ = 37656402. Its totient is φ = 37656400.

The previous prime is 37656397. The next prime is 37656427. The reversal of 37656401 is 10465673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31629376 + 6027025 = 5624^2 + 2455^2 .

It is an emirp because it is prime and its reverse (10465673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37656401 - 2² = 37656397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37656481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18828200 + 18828201.

It is an arithmetic number, because the mean of its divisors is an integer number (18828201).

Almost surely, 2^37656401 is an apocalyptic number.

It is an amenable number.

37656401 is a deficient number, since it is larger than the sum of its proper divisors (1).

37656401 is an equidigital number, since it uses as much as digits as its factorization.

37656401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 37656401 is about 6136.4811577972. The cubic root of 37656401 is about 335.1811628721.

The spelling of 37656401 in words is "thirty-seven million, six hundred fifty-six thousand, four hundred one".