725978111 has 2 divisors, whose sum is σ = 725978112. Its totient is φ = 725978110.

The previous prime is 725978107. The next prime is 725978117. The reversal of 725978111 is 111879527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725978111 - 2² = 725978107 is a prime.

It is a super-2 number, since 2×725978111² = 1054088435302256642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725978117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362989055 + 362989056.

It is an arithmetic number, because the mean of its divisors is an integer number (362989056).

Almost surely, 2^725978111 is an apocalyptic number.

725978111 is a deficient number, since it is larger than the sum of its proper divisors (1).

725978111 is an equidigital number, since it uses as much as digits as its factorization.

725978111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 41.

The square root of 725978111 is about 26943.9809790610. The cubic root of 725978111 is about 898.7547020000.

It can be divided in two parts, 72597 and 8111, that added together give a palindrome (80708).

The spelling of 725978111 in words is "seven hundred twenty-five million, nine hundred seventy-eight thousand, one hundred eleven".