56798981 has 4 divisors (see below), whose sum is σ = 58184364. Its totient is φ = 55413600.

The previous prime is 56798971. The next prime is 56798993. The reversal of 56798981 is 18989765.

56798981 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 can be written as a sum of positive squares in 2 ways, for example, as 17986081 + 38812900 = 4241^2 + 6230^2 .

It is a cyclic number.

It is not a de Polignac number, because 56798981 - 2¹⁰ = 56797957 is a prime.

It is a super-2 number, since 2×56798981² = 6452248485276722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56798941) 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, 692630 + ... + 692711.

It is an arithmetic number, because the mean of its divisors is an integer number (14546091).

Almost surely, 2^56798981 is an apocalyptic number.

It is an amenable number.

56798981 is a deficient number, since it is larger than the sum of its proper divisors (1385383).

56798981 is a wasteful number, since it uses less digits than its factorization.

56798981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385382.

The product of its digits is 1088640, while the sum is 53.

The square root of 56798981 is about 7536.5098686328. The cubic root of 56798981 is about 384.3971698143.

The spelling of 56798981 in words is "fifty-six million, seven hundred ninety-eight thousand, nine hundred eighty-one".