56886989 has 2 divisors, whose sum is σ = 56886990. Its totient is φ = 56886988.

The previous prime is 56886961. The next prime is 56886997. The reversal of 56886989 is 98968865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37920964 + 18966025 = 6158^2 + 4355^2 .

It is a cyclic number.

It is not a de Polignac number, because 56886989 - 2¹² = 56882893 is a prime.

It is a super-2 number, since 2×56886989² = 6472259034972242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56886919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28443494 + 28443495.

It is an arithmetic number, because the mean of its divisors is an integer number (28443495).

Almost surely, 2^56886989 is an apocalyptic number.

It is an amenable number.

56886989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56886989 is an equidigital number, since it uses as much as digits as its factorization.

56886989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 59.

The square root of 56886989 is about 7542.3463855752. The cubic root of 56886989 is about 384.5956039396.

It can be divided in two parts, 56886 and 989, that added together give a palindrome (57875).

The spelling of 56886989 in words is "fifty-six million, eight hundred eighty-six thousand, nine hundred eighty-nine".