725637769 has 2 divisors, whose sum is σ = 725637770. Its totient is φ = 725637768.

The previous prime is 725637719. The next prime is 725637799. The reversal of 725637769 is 967736527.

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., 722964544 + 2673225 = 26888^2 + 1635^2 .

It is an emirp because it is prime and its reverse (967736527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725637769 - 2²¹ = 723540617 is a prime.

It is a super-2 number, since 2×725637769² = 1053100343598594722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725637719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362818884 + 362818885.

It is an arithmetic number, because the mean of its divisors is an integer number (362818885).

Almost surely, 2^725637769 is an apocalyptic number.

It is an amenable number.

725637769 is a deficient number, since it is larger than the sum of its proper divisors (1).

725637769 is an equidigital number, since it uses as much as digits as its factorization.

725637769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3333960, while the sum is 52.

The square root of 725637769 is about 26937.6645052982. The cubic root of 725637769 is about 898.6142332170.

The spelling of 725637769 in words is "seven hundred twenty-five million, six hundred thirty-seven thousand, seven hundred sixty-nine".