53999567 has 4 divisors (see below), whose sum is σ = 54076440. Its totient is φ = 53922696.

The previous prime is 53999503. The next prime is 53999587. The reversal of 53999567 is 76599935.

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 53999567 - 2⁶ = 53999503 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 (53999587) 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, 37373 + ... + 38790.

It is an arithmetic number, because the mean of its divisors is an integer number (13519110).

Almost surely, 2^53999567 is an apocalyptic number.

53999567 is a deficient number, since it is larger than the sum of its proper divisors (76873).

53999567 is an equidigital number, since it uses as much as digits as its factorization.

53999567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76872.

The product of its digits is 2296350, while the sum is 53.

The square root of 53999567 is about 7348.4397663722. The cubic root of 53999567 is about 377.9753046957.

The spelling of 53999567 in words is "fifty-three million, nine hundred ninety-nine thousand, five hundred sixty-seven".