54972987 has 16 divisors (see below), whose sum is σ = 74371872. Its totient is φ = 36115200.

The previous prime is 54972961. The next prime is 54972989. The reversal of 54972987 is 78927945.

It is not a de Polignac number, because 54972987 - 2¹⁶ = 54907451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54972989) 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, 120063 + ... + 120519.

It is an arithmetic number, because the mean of its divisors is an integer number (4648242).

Almost surely, 2^54972987 is an apocalyptic number.

54972987 is a deficient number, since it is larger than the sum of its proper divisors (19398885).

54972987 is a wasteful number, since it uses less digits than its factorization.

54972987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its digits is 1270080, while the sum is 51.

The square root of 54972987 is about 7414.3770473318. The cubic root of 54972987 is about 380.2329757866.

It can be divided in two parts, 549 and 72987, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 54972987 in words is "fifty-four million, nine hundred seventy-two thousand, nine hundred eighty-seven".