56291839 has 2 divisors, whose sum is σ = 56291840. Its totient is φ = 56291838.

The previous prime is 56291831. The next prime is 56291857. The reversal of 56291839 is 93819265.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56291839 - 2³ = 56291831 is a prime.

It is a super-2 number, since 2×56291839² = 6337542276003842, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56291795 and 56291804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56291831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28145919 + 28145920.

It is an arithmetic number, because the mean of its divisors is an integer number (28145920).

Almost surely, 2^56291839 is an apocalyptic number.

56291839 is a deficient number, since it is larger than the sum of its proper divisors (1).

56291839 is an equidigital number, since it uses as much as digits as its factorization.

56291839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 56291839 is about 7502.7887481922. The cubic root of 56291839 is about 383.2496900469.

The spelling of 56291839 in words is "fifty-six million, two hundred ninety-one thousand, eight hundred thirty-nine".