53664731 has 4 divisors (see below), whose sum is σ = 54912792. Its totient is φ = 52416672.

The previous prime is 53664707. The next prime is 53664749. The reversal of 53664731 is 13746635.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53664731 is a prime.

It is a super-2 number, since 2×53664731² = 5759806706604722, 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 = 53664691 and 53664700.

It is not an unprimeable number, because it can be changed into a prime (53664701) 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 3 ways as a sum of consecutive naturals, for example, 623966 + ... + 624051.

It is an arithmetic number, because the mean of its divisors is an integer number (13728198).

Almost surely, 2^53664731 is an apocalyptic number.

53664731 is a deficient number, since it is larger than the sum of its proper divisors (1248061).

53664731 is a wasteful number, since it uses less digits than its factorization.

53664731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248060.

The product of its digits is 45360, while the sum is 35.

The square root of 53664731 is about 7325.6215435961. The cubic root of 53664731 is about 377.1924451405.

The spelling of 53664731 in words is "fifty-three million, six hundred sixty-four thousand, seven hundred thirty-one".