54397999 has 4 divisors (see below), whose sum is σ = 55164240. Its totient is φ = 53631760.

The previous prime is 54397991. The next prime is 54398009. The reversal of 54397999 is 99979345.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99979345 = 5 ⋅19995869.

It is a cyclic number.

It is not a de Polignac number, because 54397999 - 2³ = 54397991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54397991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383014 + ... + 383155.

It is an arithmetic number, because the mean of its divisors is an integer number (13791060).

Almost surely, 2^54397999 is an apocalyptic number.

54397999 is a deficient number, since it is larger than the sum of its proper divisors (766241).

54397999 is an equidigital number, since it uses as much as digits as its factorization.

54397999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766240.

The product of its digits is 2755620, while the sum is 55.

The square root of 54397999 is about 7375.4999152600. The cubic root of 54397999 is about 378.9026490239.

The spelling of 54397999 in words is "fifty-four million, three hundred ninety-seven thousand, nine hundred ninety-nine".