54974991 has 16 divisors (see below), whose sum is σ = 80987904. Its totient is φ = 32993664.

The previous prime is 54974989. The next prime is 54974993. The reversal of 54974991 is 19947945.

It is an interprime number because it is at equal distance from previous prime (54974989) and next prime (54974993).

It is not a de Polignac number, because 54974991 - 2¹ = 54974989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54974991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54974993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22261 + ... + 24606.

It is an arithmetic number, because the mean of its divisors is an integer number (5061744).

Almost surely, 2^54974991 is an apocalyptic number.

54974991 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

54974991 is a deficient number, since it is larger than the sum of its proper divisors (26012913).

54974991 is a wasteful number, since it uses less digits than its factorization.

54974991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46910.

The product of its digits is 408240, while the sum is 48.

The square root of 54974991 is about 7414.5121889441. The cubic root of 54974991 is about 380.2375961021.

The spelling of 54974991 in words is "fifty-four million, nine hundred seventy-four thousand, nine hundred ninety-one".