56690401 has 4 divisors (see below), whose sum is σ = 58222612. Its totient is φ = 55158192.

The previous prime is 56690399. The next prime is 56690407. The reversal of 56690401 is 10409665.

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 23512801 + 33177600 = 4849^2 + 5760^2 .

It is a cyclic number.

It is not a de Polignac number, because 56690401 - 2¹ = 56690399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56690407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766050 + ... + 766123.

It is an arithmetic number, because the mean of its divisors is an integer number (14555653).

Almost surely, 2^56690401 is an apocalyptic number.

It is an amenable number.

56690401 is a deficient number, since it is larger than the sum of its proper divisors (1532211).

56690401 is a wasteful number, since it uses less digits than its factorization.

56690401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532210.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 56690401 is about 7529.3028229711. The cubic root of 56690401 is about 384.1520687676.

The spelling of 56690401 in words is "fifty-six million, six hundred ninety thousand, four hundred one".