56987749 has 8 divisors (see below), whose sum is σ = 70138880. Its totient is φ = 45089136.

The previous prime is 56987747. The next prime is 56987759. The reversal of 56987749 is 94778965.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56987749 - 2¹ = 56987747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56987749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56987741) 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, 313029 + ... + 313210.

It is an arithmetic number, because the mean of its divisors is an integer number (8767360).

Almost surely, 2^56987749 is an apocalyptic number.

It is an amenable number.

56987749 is a deficient number, since it is larger than the sum of its proper divisors (13151131).

56987749 is a wasteful number, since it uses less digits than its factorization.

56987749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626259.

The product of its digits is 3810240, while the sum is 55.

The square root of 56987749 is about 7549.0230493753. The cubic root of 56987749 is about 384.8225392297.

The spelling of 56987749 in words is "fifty-six million, nine hundred eighty-seven thousand, seven hundred forty-nine".