56994391 has 4 divisors (see below), whose sum is σ = 59472432. Its totient is φ = 54516352.

The previous prime is 56994389. The next prime is 56994397. The reversal of 56994391 is 19349965.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19349965 = 5 ⋅3869993.

It is a cyclic number.

It is not a de Polignac number, because 56994391 - 2¹ = 56994389 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 (56994397) 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, 1238986 + ... + 1239031.

It is an arithmetic number, because the mean of its divisors is an integer number (14868108).

Almost surely, 2^56994391 is an apocalyptic number.

56994391 is a deficient number, since it is larger than the sum of its proper divisors (2478041).

56994391 is a wasteful number, since it uses less digits than its factorization.

56994391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478040.

The product of its digits is 262440, while the sum is 46.

The square root of 56994391 is about 7549.4629610324. The cubic root of 56994391 is about 384.8374891798.

The spelling of 56994391 in words is "fifty-six million, nine hundred ninety-four thousand, three hundred ninety-one".