56891077 has 2 divisors, whose sum is σ = 56891078. Its totient is φ = 56891076.

The previous prime is 56891071. The next prime is 56891113. The reversal of 56891077 is 77019865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50495236 + 6395841 = 7106^2 + 2529^2 .

It is a cyclic number.

It is not a de Polignac number, because 56891077 - 2⁷ = 56890949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56891071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28445538 + 28445539.

It is an arithmetic number, because the mean of its divisors is an integer number (28445539).

Almost surely, 2^56891077 is an apocalyptic number.

It is an amenable number.

56891077 is a deficient number, since it is larger than the sum of its proper divisors (1).

56891077 is an equidigital number, since it uses as much as digits as its factorization.

56891077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 56891077 is about 7542.6173839059. The cubic root of 56891077 is about 384.6048162932.

The spelling of 56891077 in words is "fifty-six million, eight hundred ninety-one thousand, seventy-seven".