53992921 has 2 divisors, whose sum is σ = 53992922. Its totient is φ = 53992920.

The previous prime is 53992871. The next prime is 53992931. The reversal of 53992921 is 12929935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50965321 + 3027600 = 7139^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 53992921 - 2²¹ = 51895769 is a prime.

It is a super-2 number, since 2×53992921² = 5830471036224482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53992931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26996460 + 26996461.

It is an arithmetic number, because the mean of its divisors is an integer number (26996461).

Almost surely, 2^53992921 is an apocalyptic number.

It is an amenable number.

53992921 is a deficient number, since it is larger than the sum of its proper divisors (1).

53992921 is an equidigital number, since it uses as much as digits as its factorization.

53992921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 40.

The square root of 53992921 is about 7347.9875476215. The cubic root of 53992921 is about 377.9597976150.

The spelling of 53992921 in words is "fifty-three million, nine hundred ninety-two thousand, nine hundred twenty-one".