56921797 has 8 divisors (see below), whose sum is σ = 62214912. Its totient is φ = 51844800.

The previous prime is 56921789. The next prime is 56921807. The reversal of 56921797 is 79712965.

It is a happy number.

56921797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56921797 - 2³ = 56921789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56921707) 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 7 ways as a sum of consecutive naturals, for example, 53479 + ... + 54532.

It is an arithmetic number, because the mean of its divisors is an integer number (7776864).

Almost surely, 2^56921797 is an apocalyptic number.

It is an amenable number.

56921797 is a deficient number, since it is larger than the sum of its proper divisors (5293115).

56921797 is a wasteful number, since it uses less digits than its factorization.

56921797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108059.

The product of its digits is 238140, while the sum is 46.

The square root of 56921797 is about 7544.6535374396. The cubic root of 56921797 is about 384.6740300410.

It can be divided in two parts, 569 and 21797, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 56921797 in words is "fifty-six million, nine hundred twenty-one thousand, seven hundred ninety-seven".