54911987 has 12 divisors (see below), whose sum is σ = 60288984. Its totient is φ = 49982400.

The previous prime is 54911963. The next prime is 54912001. The reversal of 54911987 is 78911945.

It is not a de Polignac number, because 54911987 - 2¹⁰ = 54910963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54911687) 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, 10112 + ... + 14562.

It is an arithmetic number, because the mean of its divisors is an integer number (5024082).

Almost surely, 2^54911987 is an apocalyptic number.

54911987 is a deficient number, since it is larger than the sum of its proper divisors (5376997).

54911987 is a wasteful number, since it uses less digits than its factorization.

54911987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550 (or 4537 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 54911987 is about 7410.2622760601. The cubic root of 54911987 is about 380.0922836811.

The spelling of 54911987 in words is "fifty-four million, nine hundred eleven thousand, nine hundred eighty-seven".