56968981 has 4 divisors (see below), whose sum is σ = 57749452. Its totient is φ = 56188512.

The previous prime is 56968969. The next prime is 56968993. The reversal of 56968981 is 18986965.

56968981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (56968969) and next prime (56968993).

It can be written as a sum of positive squares in 2 ways, for example, as 16443025 + 40525956 = 4055^2 + 6366^2 .

It is a cyclic number.

It is not a de Polignac number, because 56968981 - 2⁹ = 56968469 is a prime.

It is a super-2 number, since 2×56968981² = 6490929592356722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56968931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390126 + ... + 390271.

It is an arithmetic number, because the mean of its divisors is an integer number (14437363).

Almost surely, 2^56968981 is an apocalyptic number.

It is an amenable number.

56968981 is a deficient number, since it is larger than the sum of its proper divisors (780471).

56968981 is an equidigital number, since it uses as much as digits as its factorization.

56968981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780470.

The product of its digits is 933120, while the sum is 52.

The square root of 56968981 is about 7547.7798722538. The cubic root of 56968981 is about 384.7802895500.

The spelling of 56968981 in words is "fifty-six million, nine hundred sixty-eight thousand, nine hundred eighty-one".