53664497 has 4 divisors (see below), whose sum is σ = 55997760. Its totient is φ = 51331236.

The previous prime is 53664439. The next prime is 53664511. The reversal of 53664497 is 79446635.

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 53664497 - 2¹⁰ = 53663473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53664437) 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, 1166597 + ... + 1166642.

It is an arithmetic number, because the mean of its divisors is an integer number (13999440).

Almost surely, 2^53664497 is an apocalyptic number.

It is an amenable number.

53664497 is a deficient number, since it is larger than the sum of its proper divisors (2333263).

53664497 is a wasteful number, since it uses less digits than its factorization.

53664497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333262.

The product of its digits is 544320, while the sum is 44.

The square root of 53664497 is about 7325.6055722377. The cubic root of 53664497 is about 377.1918969024.

The spelling of 53664497 in words is "fifty-three million, six hundred sixty-four thousand, four hundred ninety-seven".