53973399 has 4 divisors (see below), whose sum is σ = 71964536. Its totient is φ = 35982264.

The previous prime is 53973389. The next prime is 53973431. The reversal of 53973399 is 99337935.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53973399 - 2⁹ = 53972887 is a prime.

It is a super-2 number, since 2×53973399² = 5826255599226402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53973329) 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, 8995564 + ... + 8995569.

It is an arithmetic number, because the mean of its divisors is an integer number (17991134).

Almost surely, 2^53973399 is an apocalyptic number.

53973399 is a deficient number, since it is larger than the sum of its proper divisors (17991137).

53973399 is a wasteful number, since it uses less digits than its factorization.

53973399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17991136.

The product of its digits is 688905, while the sum is 48.

The square root of 53973399 is about 7346.6590365962. The cubic root of 53973399 is about 377.9142396635.

The spelling of 53973399 in words is "fifty-three million, nine hundred seventy-three thousand, three hundred ninety-nine".