56998121 has 4 divisors (see below), whose sum is σ = 57375744. Its totient is φ = 56620500.

The previous prime is 56998103. The next prime is 56998129. The reversal of 56998121 is 12189965.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12189965 = 5 ⋅2437993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56998121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56998129) 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, 188585 + ... + 188886.

It is an arithmetic number, because the mean of its divisors is an integer number (14343936).

Almost surely, 2^56998121 is an apocalyptic number.

It is an amenable number.

56998121 is a deficient number, since it is larger than the sum of its proper divisors (377623).

56998121 is a wasteful number, since it uses less digits than its factorization.

56998121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377622.

The product of its digits is 38880, while the sum is 41.

The square root of 56998121 is about 7549.7099944302. The cubic root of 56998121 is about 384.8458842311.

The spelling of 56998121 in words is "fifty-six million, nine hundred ninety-eight thousand, one hundred twenty-one".