56617487 has 4 divisors (see below), whose sum is σ = 56653080. Its totient is φ = 56581896.

The previous prime is 56617481. The next prime is 56617523. The reversal of 56617487 is 78471665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78471665 = 5 ⋅15694333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56617487 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 (56617481) 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, 15293 + ... + 18630.

It is an arithmetic number, because the mean of its divisors is an integer number (14163270).

Almost surely, 2^56617487 is an apocalyptic number.

56617487 is a deficient number, since it is larger than the sum of its proper divisors (35593).

56617487 is a wasteful number, since it uses less digits than its factorization.

56617487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35592.

The product of its digits is 282240, while the sum is 44.

The square root of 56617487 is about 7524.4592496737. The cubic root of 56617487 is about 383.9873020070.

The spelling of 56617487 in words is "fifty-six million, six hundred seventeen thousand, four hundred eighty-seven".