365724721 has 2 divisors, whose sum is σ = 365724722. Its totient is φ = 365724720.

The previous prime is 365724691. The next prime is 365724739. The reversal of 365724721 is 127427563.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301404321 + 64320400 = 17361^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 365724721 - 2⁹ = 365724209 is a prime.

It is not a weakly prime, because it can be changed into another prime (365724781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182862360 + 182862361.

It is an arithmetic number, because the mean of its divisors is an integer number (182862361).

Almost surely, 2^365724721 is an apocalyptic number.

It is an amenable number.

365724721 is a deficient number, since it is larger than the sum of its proper divisors (1).

365724721 is an equidigital number, since it uses as much as digits as its factorization.

365724721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 365724721 is about 19123.9305844798. The cubic root of 365724721 is about 715.1296297804.

The spelling of 365724721 in words is "three hundred sixty-five million, seven hundred twenty-four thousand, seven hundred twenty-one".