53364721 has 2 divisors, whose sum is σ = 53364722. Its totient is φ = 53364720.

The previous prime is 53364713. The next prime is 53364743. The reversal of 53364721 is 12746335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47059600 + 6305121 = 6860^2 + 2511^2 .

It is a cyclic number.

It is not a de Polignac number, because 53364721 - 2³ = 53364713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53362721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26682360 + 26682361.

It is an arithmetic number, because the mean of its divisors is an integer number (26682361).

Almost surely, 2^53364721 is an apocalyptic number.

It is an amenable number.

53364721 is a deficient number, since it is larger than the sum of its proper divisors (1).

53364721 is an equidigital number, since it uses as much as digits as its factorization.

53364721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 31.

The square root of 53364721 is about 7305.1160839510. The cubic root of 53364721 is about 376.4882393843.

The spelling of 53364721 in words is "fifty-three million, three hundred sixty-four thousand, seven hundred twenty-one".