56620091 has 4 divisors (see below), whose sum is σ = 61767384. Its totient is φ = 51472800.

The previous prime is 56620087. The next prime is 56620097. The reversal of 56620091 is 19002665.

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

It is a cyclic number.

It is not a de Polignac number, because 56620091 - 2² = 56620087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56620097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573630 + ... + 2573651.

It is an arithmetic number, because the mean of its divisors is an integer number (15441846).

Almost surely, 2^56620091 is an apocalyptic number.

56620091 is a deficient number, since it is larger than the sum of its proper divisors (5147293).

56620091 is a wasteful number, since it uses less digits than its factorization.

56620091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147292.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 56620091 is about 7524.6322833744. The cubic root of 56620091 is about 383.9931888079.

The spelling of 56620091 in words is "fifty-six million, six hundred twenty thousand, ninety-one".