725047621 has 2 divisors, whose sum is σ = 725047622. Its totient is φ = 725047620.

The previous prime is 725047613. The next prime is 725047679. The reversal of 725047621 is 126740527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712302721 + 12744900 = 26689^2 + 3570^2 .

It is a cyclic number.

It is not a de Polignac number, because 725047621 - 2³ = 725047613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725047691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362523810 + 362523811.

It is an arithmetic number, because the mean of its divisors is an integer number (362523811).

Almost surely, 2^725047621 is an apocalyptic number.

It is an amenable number.

725047621 is a deficient number, since it is larger than the sum of its proper divisors (1).

725047621 is an equidigital number, since it uses as much as digits as its factorization.

725047621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 725047621 is about 26926.7083209218. The cubic root of 725047621 is about 898.3705582755.

The spelling of 725047621 in words is "seven hundred twenty-five million, forty-seven thousand, six hundred twenty-one".