53991923 has 2 divisors, whose sum is σ = 53991924. Its totient is φ = 53991922.

The previous prime is 53991919. The next prime is 53991929. The reversal of 53991923 is 32919935.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53991923 - 2² = 53991919 is a prime.

It is not a weakly prime, because it can be changed into another prime (53991929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26995961 + 26995962.

It is an arithmetic number, because the mean of its divisors is an integer number (26995962).

Almost surely, 2^53991923 is an apocalyptic number.

53991923 is a deficient number, since it is larger than the sum of its proper divisors (1).

53991923 is an equidigital number, since it uses as much as digits as its factorization.

53991923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 41.

The square root of 53991923 is about 7347.9196375573. The cubic root of 53991923 is about 377.9574688764.

The spelling of 53991923 in words is "fifty-three million, nine hundred ninety-one thousand, nine hundred twenty-three".