56447091 has 8 divisors (see below), whose sum is σ = 83625360. Its totient is φ = 37631376.

The previous prime is 56447071. The next prime is 56447107. The reversal of 56447091 is 19074465.

56447091 is a `hidden beast` number, since 5 + 644 + 7 + 0 + 9 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-56447091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56447051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045290 + ... + 1045343.

It is an arithmetic number, because the mean of its divisors is an integer number (10453170).

Almost surely, 2^56447091 is an apocalyptic number.

56447091 is a deficient number, since it is larger than the sum of its proper divisors (27178269).

56447091 is a wasteful number, since it uses less digits than its factorization.

56447091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090642 (or 2090636 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 56447091 is about 7513.1279105310. The cubic root of 56447091 is about 383.6016988243.

The spelling of 56447091 in words is "fifty-six million, four hundred forty-seven thousand, ninety-one".