56018839 has 2 divisors, whose sum is σ = 56018840. Its totient is φ = 56018838.

The previous prime is 56018797. The next prime is 56018849. The reversal of 56018839 is 93881065.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56018839 is a prime.

It is a super-2 number, since 2×56018839² = 6276220645815842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56018849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28009419 + 28009420.

It is an arithmetic number, because the mean of its divisors is an integer number (28009420).

Almost surely, 2^56018839 is an apocalyptic number.

56018839 is a deficient number, since it is larger than the sum of its proper divisors (1).

56018839 is an equidigital number, since it uses as much as digits as its factorization.

56018839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 56018839 is about 7484.5734013369. The cubic root of 56018839 is about 382.6291337808.

The spelling of 56018839 in words is "fifty-six million, eighteen thousand, eight hundred thirty-nine".