56891839 has 2 divisors, whose sum is σ = 56891840. Its totient is φ = 56891838.

The previous prime is 56891837. The next prime is 56891869. The reversal of 56891839 is 93819865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56891839 - 2¹ = 56891837 is a prime.

Together with 56891837, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56891792 and 56891801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56891837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28445919 + 28445920.

It is an arithmetic number, because the mean of its divisors is an integer number (28445920).

Almost surely, 2^56891839 is an apocalyptic number.

56891839 is a deficient number, since it is larger than the sum of its proper divisors (1).

56891839 is an equidigital number, since it uses as much as digits as its factorization.

56891839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 56891839 is about 7542.6678967060. The cubic root of 56891839 is about 384.6065334199.

The spelling of 56891839 in words is "fifty-six million, eight hundred ninety-one thousand, eight hundred thirty-nine".