53664857 has 4 divisors (see below), whose sum is σ = 53730576. Its totient is φ = 53599140.

The previous prime is 53664851. The next prime is 53664893. The reversal of 53664857 is 75846635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53664857 - 2⁴ = 53664841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53664851) 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, 31619 + ... + 33272.

It is an arithmetic number, because the mean of its divisors is an integer number (13432644).

Almost surely, 2^53664857 is an apocalyptic number.

It is an amenable number.

53664857 is a deficient number, since it is larger than the sum of its proper divisors (65719).

53664857 is an equidigital number, since it uses as much as digits as its factorization.

53664857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65718.

The product of its digits is 604800, while the sum is 44.

The square root of 53664857 is about 7325.6301435440. The cubic root of 53664857 is about 377.1927403450.

The spelling of 53664857 in words is "fifty-three million, six hundred sixty-four thousand, eight hundred fifty-seven".