54399965 has 16 divisors (see below), whose sum is σ = 66862848. Its totient is φ = 42477696.

The previous prime is 54399959. The next prime is 54399971. The reversal of 54399965 is 56999345.

It is an interprime number because it is at equal distance from previous prime (54399959) and next prime (54399971).

It is a cyclic number.

It is not a de Polignac number, because 54399965 - 2¹⁰ = 54398941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36872 + ... + 38318.

It is an arithmetic number, because the mean of its divisors is an integer number (4178928).

Almost surely, 2^54399965 is an apocalyptic number.

It is an amenable number.

54399965 is a deficient number, since it is larger than the sum of its proper divisors (12462883).

54399965 is a wasteful number, since it uses less digits than its factorization.

54399965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its digits is 1312200, while the sum is 50.

The square root of 54399965 is about 7375.6331931570. The cubic root of 54399965 is about 378.9072136136.

The spelling of 54399965 in words is "fifty-four million, three hundred ninety-nine thousand, nine hundred sixty-five".