725223091 has 2 divisors, whose sum is σ = 725223092. Its totient is φ = 725223090.

The previous prime is 725223089. The next prime is 725223133. The reversal of 725223091 is 190322527.

725223091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725223091 - 2¹ = 725223089 is a prime.

Together with 725223089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (725223001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362611545 + 362611546.

It is an arithmetic number, because the mean of its divisors is an integer number (362611546).

Almost surely, 2^725223091 is an apocalyptic number.

725223091 is a deficient number, since it is larger than the sum of its proper divisors (1).

725223091 is an equidigital number, since it uses as much as digits as its factorization.

725223091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 725223091 is about 26929.9664129014. The cubic root of 725223091 is about 898.4430244889.

The spelling of 725223091 in words is "seven hundred twenty-five million, two hundred twenty-three thousand, ninety-one".