53991929 has 2 divisors, whose sum is σ = 53991930. Its totient is φ = 53991928.

The previous prime is 53991923. The next prime is 53991937. The reversal of 53991929 is 92919935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50197225 + 3794704 = 7085^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 53991929 - 2¹⁶ = 53926393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53991923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26995964 + 26995965.

It is an arithmetic number, because the mean of its divisors is an integer number (26995965).

Almost surely, 2^53991929 is an apocalyptic number.

It is an amenable number.

53991929 is a deficient number, since it is larger than the sum of its proper divisors (1).

53991929 is an equidigital number, since it uses as much as digits as its factorization.

53991929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196830, while the sum is 47.

The square root of 53991929 is about 7347.9200458361. The cubic root of 53991929 is about 377.9574828769.

The spelling of 53991929 in words is "fifty-three million, nine hundred ninety-one thousand, nine hundred twenty-nine".