56454987 has 4 divisors (see below), whose sum is σ = 75273320. Its totient is φ = 37636656.

The previous prime is 56454971. The next prime is 56454997. The reversal of 56454987 is 78945465.

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

It is not a de Polignac number, because 56454987 - 2⁴ = 56454971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56454997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9409162 + ... + 9409167.

It is an arithmetic number, because the mean of its divisors is an integer number (18818330).

Almost surely, 2^56454987 is an apocalyptic number.

56454987 is a deficient number, since it is larger than the sum of its proper divisors (18818333).

56454987 is a wasteful number, since it uses less digits than its factorization.

56454987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18818332.

The product of its digits is 1209600, while the sum is 48.

The square root of 56454987 is about 7513.6533723615. The cubic root of 56454987 is about 383.6195844687.

The spelling of 56454987 in words is "fifty-six million, four hundred fifty-four thousand, nine hundred eighty-seven".