56036989 has 2 divisors, whose sum is σ = 56036990. Its totient is φ = 56036988.

The previous prime is 56036983. The next prime is 56036999. The reversal of 56036989 is 98963065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55756089 + 280900 = 7467^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 56036989 - 2⁵ = 56036957 is a prime.

It is a super-2 number, since 2×56036989² = 6280288272372242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56036983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28018494 + 28018495.

It is an arithmetic number, because the mean of its divisors is an integer number (28018495).

Almost surely, 2^56036989 is an apocalyptic number.

It is an amenable number.

56036989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56036989 is an equidigital number, since it uses as much as digits as its factorization.

56036989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 56036989 is about 7485.7857970957. The cubic root of 56036989 is about 382.6704530288.

The spelling of 56036989 in words is "fifty-six million, thirty-six thousand, nine hundred eighty-nine".