56906587 has 4 divisors (see below), whose sum is σ = 58230040. Its totient is φ = 55583136.

The previous prime is 56906569. The next prime is 56906593. The reversal of 56906587 is 78560965.

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 56906587 - 2¹¹ = 56904539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56906557) 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, 661662 + ... + 661747.

It is an arithmetic number, because the mean of its divisors is an integer number (14557510).

Almost surely, 2^56906587 is an apocalyptic number.

56906587 is a deficient number, since it is larger than the sum of its proper divisors (1323453).

56906587 is a wasteful number, since it uses less digits than its factorization.

56906587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323452.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 56906587 is about 7543.6454715210. The cubic root of 56906587 is about 384.6397642382.

The spelling of 56906587 in words is "fifty-six million, nine hundred six thousand, five hundred eighty-seven".