54990891 has 12 divisors (see below), whose sum is σ = 80778360. Its totient is φ = 36038880.

The previous prime is 54990889. The next prime is 54991043. The reversal of 54990891 is 19809945.

It is not a de Polignac number, because 54990891 - 2¹ = 54990889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54990811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51250 + ... + 52311.

It is an arithmetic number, because the mean of its divisors is an integer number (6731530).

Almost surely, 2^54990891 is an apocalyptic number.

54990891 is a deficient number, since it is larger than the sum of its proper divisors (25787469).

54990891 is a wasteful number, since it uses less digits than its factorization.

54990891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103626 (or 103623 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 54990891 is about 7415.5843330111. The cubic root of 54990891 is about 380.2742503146.

The spelling of 54990891 in words is "fifty-four million, nine hundred ninety thousand, eight hundred ninety-one".