53391999 has 8 divisors (see below), whose sum is σ = 73113520. Its totient is φ = 34632576.

The previous prime is 53391983. The next prime is 53392021. The reversal of 53391999 is 99919335.

It is a happy number.

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

It is not a de Polignac number, because 53391999 - 2⁴ = 53391983 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 (53391959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240394 + ... + 240615.

It is an arithmetic number, because the mean of its divisors is an integer number (9139190).

Almost surely, 2^53391999 is an apocalyptic number.

53391999 is a deficient number, since it is larger than the sum of its proper divisors (19721521).

53391999 is a wasteful number, since it uses less digits than its factorization.

53391999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481049.

The product of its digits is 295245, while the sum is 48.

The square root of 53391999 is about 7306.9828930962. The cubic root of 53391999 is about 376.5523772432.

The spelling of 53391999 in words is "fifty-three million, three hundred ninety-one thousand, nine hundred ninety-nine".