725363081 has 2 divisors, whose sum is σ = 725363082. Its totient is φ = 725363080.

The previous prime is 725363047. The next prime is 725363099. The reversal of 725363081 is 180363527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551545225 + 173817856 = 23485^2 + 13184^2 .

It is an emirp because it is prime and its reverse (180363527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725363081 is a prime.

It is a super-2 number, since 2×725363081² = 1052303198555625122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725360081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362681540 + 362681541.

It is an arithmetic number, because the mean of its divisors is an integer number (362681541).

Almost surely, 2^725363081 is an apocalyptic number.

It is an amenable number.

725363081 is a deficient number, since it is larger than the sum of its proper divisors (1).

725363081 is an equidigital number, since it uses as much as digits as its factorization.

725363081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 725363081 is about 26932.5654366605. The cubic root of 725363081 is about 898.5008296658.

The spelling of 725363081 in words is "seven hundred twenty-five million, three hundred sixty-three thousand, eighty-one".