725999999 has 2 divisors, whose sum is σ = 726000000. Its totient is φ = 725999998.

The previous prime is 725999969. The next prime is 726000017. The reversal of 725999999 is 999999527.

It is a strong prime.

It is an emirp because it is prime and its reverse (999999527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725999999 - 2¹² = 725995903 is a prime.

It is a Chen prime.

725999999 is a modest number, since divided by 99999 gives 7259 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725999969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362999999 + 363000000.

It is an arithmetic number, because the mean of its divisors is an integer number (363000000).

Almost surely, 2^725999999 is an apocalyptic number.

725999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

725999999 is an equidigital number, since it uses as much as digits as its factorization.

725999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37200870, while the sum is 68.

The square root of 725999999 is about 26944.3871520582. The cubic root of 725999999 is about 898.7637342949.

The spelling of 725999999 in words is "seven hundred twenty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".