54991489 has 8 divisors (see below), whose sum is σ = 64875008. Its totient is φ = 45614880.

The previous prime is 54991487. The next prime is 54991493. The reversal of 54991489 is 98419945.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54991489 - 2¹ = 54991487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54991483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126492 + ... + 126925.

It is an arithmetic number, because the mean of its divisors is an integer number (8109376).

Almost surely, 2^54991489 is an apocalyptic number.

It is an amenable number.

54991489 is a deficient number, since it is larger than the sum of its proper divisors (9883519).

54991489 is a wasteful number, since it uses less digits than its factorization.

54991489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253455.

The product of its digits is 466560, while the sum is 49.

The square root of 54991489 is about 7415.6246533923. The cubic root of 54991489 is about 380.2756287440.

The spelling of 54991489 in words is "fifty-four million, nine hundred ninety-one thousand, four hundred eighty-nine".