54129399 has 8 divisors (see below), whose sum is σ = 74661360. Its totient is φ = 34841856.

The previous prime is 54129391. The next prime is 54129403. The reversal of 54129399 is 99392145.

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

It is not a de Polignac number, because 54129399 - 2³ = 54129391 is a prime.

It is a super-2 number, since 2×54129399² = 5859983672202402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 54129399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54129391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311002 + ... + 311175.

It is an arithmetic number, because the mean of its divisors is an integer number (9332670).

Almost surely, 2^54129399 is an apocalyptic number.

54129399 is a deficient number, since it is larger than the sum of its proper divisors (20531961).

54129399 is a wasteful number, since it uses less digits than its factorization.

54129399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622209.

The product of its digits is 87480, while the sum is 42.

The square root of 54129399 is about 7357.2684469170. The cubic root of 54129399 is about 378.2779862153.

The spelling of 54129399 in words is "fifty-four million, one hundred twenty-nine thousand, three hundred ninety-nine".