56998749 has 4 divisors (see below), whose sum is σ = 75998336. Its totient is φ = 37999164.

The previous prime is 56998741. The next prime is 56998763. The reversal of 56998749 is 94789965.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56998749 - 2³ = 56998741 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 (56998741) 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, 9499789 + ... + 9499794.

It is an arithmetic number, because the mean of its divisors is an integer number (18999584).

Almost surely, 2^56998749 is an apocalyptic number.

It is an amenable number.

56998749 is a deficient number, since it is larger than the sum of its proper divisors (18999587).

56998749 is a wasteful number, since it uses less digits than its factorization.

56998749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18999586.

The product of its digits is 4898880, while the sum is 57.

The square root of 56998749 is about 7549.7515853172. The cubic root of 56998749 is about 384.8472976247.

The spelling of 56998749 in words is "fifty-six million, nine hundred ninety-eight thousand, seven hundred forty-nine".