56491297 has 2 divisors, whose sum is σ = 56491298. Its totient is φ = 56491296.

The previous prime is 56491283. The next prime is 56491319. The reversal of 56491297 is 79219465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56415121 + 76176 = 7511^2 + 276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56491297 is a prime.

It is not a weakly prime, because it can be changed into another prime (56491597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28245648 + 28245649.

It is an arithmetic number, because the mean of its divisors is an integer number (28245649).

Almost surely, 2^56491297 is an apocalyptic number.

It is an amenable number.

56491297 is a deficient number, since it is larger than the sum of its proper divisors (1).

56491297 is an equidigital number, since it uses as much as digits as its factorization.

56491297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 56491297 is about 7516.0692519428. The cubic root of 56491297 is about 383.7018106967.

The spelling of 56491297 in words is "fifty-six million, four hundred ninety-one thousand, two hundred ninety-seven".