56439797 has 2 divisors, whose sum is σ = 56439798. Its totient is φ = 56439796.

The previous prime is 56439793. The next prime is 56439811. The reversal of 56439797 is 79793465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55860676 + 579121 = 7474^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 56439797 - 2² = 56439793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56439791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28219898 + 28219899.

It is an arithmetic number, because the mean of its divisors is an integer number (28219899).

Almost surely, 2^56439797 is an apocalyptic number.

It is an amenable number.

56439797 is a deficient number, since it is larger than the sum of its proper divisors (1).

56439797 is an equidigital number, since it uses as much as digits as its factorization.

56439797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 50.

The square root of 56439797 is about 7512.6424778503. The cubic root of 56439797 is about 383.5851753196.

The spelling of 56439797 in words is "fifty-six million, four hundred thirty-nine thousand, seven hundred ninety-seven".