53996921 has 4 divisors (see below), whose sum is σ = 58905744. Its totient is φ = 49088100.

The previous prime is 53996911. The next prime is 53996953. The reversal of 53996921 is 12969935.

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 53996921 - 2¹⁰ = 53995897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53996911) 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, 2454395 + ... + 2454416.

It is an arithmetic number, because the mean of its divisors is an integer number (14726436).

Almost surely, 2^53996921 is an apocalyptic number.

It is an amenable number.

53996921 is a deficient number, since it is larger than the sum of its proper divisors (4908823).

53996921 is a wasteful number, since it uses less digits than its factorization.

53996921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908822.

The product of its digits is 131220, while the sum is 44.

The square root of 53996921 is about 7348.2597259487. The cubic root of 53996921 is about 377.9691309487.

The spelling of 53996921 in words is "fifty-three million, nine hundred ninety-six thousand, nine hundred twenty-one".