56140687 has 4 divisors (see below), whose sum is σ = 59095480. Its totient is φ = 53185896.

The previous prime is 56140663. The next prime is 56140697. The reversal of 56140687 is 78604165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78604165 = 5 ⋅15720833.

It is a cyclic number.

It is not a de Polignac number, because 56140687 - 2¹¹ = 56138639 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 (56140627) 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, 1477368 + ... + 1477405.

It is an arithmetic number, because the mean of its divisors is an integer number (14773870).

Almost surely, 2^56140687 is an apocalyptic number.

56140687 is a deficient number, since it is larger than the sum of its proper divisors (2954793).

56140687 is a wasteful number, since it uses less digits than its factorization.

56140687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954792.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 56140687 is about 7492.7089226794. The cubic root of 56140687 is about 382.9063549978.

The spelling of 56140687 in words is "fifty-six million, one hundred forty thousand, six hundred eighty-seven".