53997139 has 8 divisors (see below), whose sum is σ = 62723168. Its totient is φ = 45524160.

The previous prime is 53997127. The next prime is 53997143. The reversal of 53997139 is 93179935.

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

It is a cyclic number.

It is not a de Polignac number, because 53997139 - 2⁷ = 53997011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53997149) 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, 62802 + ... + 63655.

It is an arithmetic number, because the mean of its divisors is an integer number (7840396).

Almost surely, 2^53997139 is an apocalyptic number.

53997139 is a deficient number, since it is larger than the sum of its proper divisors (8726029).

53997139 is a wasteful number, since it uses less digits than its factorization.

53997139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126525.

The product of its digits is 229635, while the sum is 46.

The square root of 53997139 is about 7348.2745593779. The cubic root of 53997139 is about 377.9696396022.

The spelling of 53997139 in words is "fifty-three million, nine hundred ninety-seven thousand, one hundred thirty-nine".