725447587 has 2 divisors, whose sum is σ = 725447588. Its totient is φ = 725447586.

The previous prime is 725447561. The next prime is 725447609. The reversal of 725447587 is 785744527.

It is a strong prime.

It is an emirp because it is prime and its reverse (785744527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725447587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 725447587.

It is not a weakly prime, because it can be changed into another prime (725447507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362723793 + 362723794.

It is an arithmetic number, because the mean of its divisors is an integer number (362723794).

Almost surely, 2^725447587 is an apocalyptic number.

725447587 is a deficient number, since it is larger than the sum of its proper divisors (1).

725447587 is an equidigital number, since it uses as much as digits as its factorization.

725447587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2195200, while the sum is 49.

The square root of 725447587 is about 26934.1342352042. The cubic root of 725447587 is about 898.5357205890.

The spelling of 725447587 in words is "seven hundred twenty-five million, four hundred forty-seven thousand, five hundred eighty-seven".