725949491 has 2 divisors, whose sum is σ = 725949492. Its totient is φ = 725949490.

The previous prime is 725949443. The next prime is 725949557. The reversal of 725949491 is 194949527.

It is a weak prime.

It is an emirp because it is prime and its reverse (194949527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725949491 is a prime.

It is a super-3 number, since 3×725949491³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (725949401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362974745 + 362974746.

It is an arithmetic number, because the mean of its divisors is an integer number (362974746).

Almost surely, 2^725949491 is an apocalyptic number.

725949491 is a deficient number, since it is larger than the sum of its proper divisors (1).

725949491 is an equidigital number, since it uses as much as digits as its factorization.

725949491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 725949491 is about 26943.4498719076. The cubic root of 725949491 is about 898.7428914063.

The spelling of 725949491 in words is "seven hundred twenty-five million, nine hundred forty-nine thousand, four hundred ninety-one".