53993239 has 4 divisors (see below), whose sum is σ = 54083680. Its totient is φ = 53902800.

The previous prime is 53993237. The next prime is 53993281. The reversal of 53993239 is 93239935.

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

It is a cyclic number.

It is not a de Polignac number, because 53993239 - 2¹ = 53993237 is a prime.

It is a super-2 number, since 2×53993239² = 5830539715422242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53993195 and 53993204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53993237) 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, 44319 + ... + 45520.

It is an arithmetic number, because the mean of its divisors is an integer number (13520920).

Almost surely, 2^53993239 is an apocalyptic number.

53993239 is a deficient number, since it is larger than the sum of its proper divisors (90441).

53993239 is an equidigital number, since it uses as much as digits as its factorization.

53993239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90440.

The product of its digits is 196830, while the sum is 43.

The square root of 53993239 is about 7348.0091861674. The cubic root of 53993239 is about 377.9605396319.

The spelling of 53993239 in words is "fifty-three million, nine hundred ninety-three thousand, two hundred thirty-nine".