725692217 has 2 divisors, whose sum is σ = 725692218. Its totient is φ = 725692216.

The previous prime is 725692199. The next prime is 725692223. The reversal of 725692217 is 712296527.

725692217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363893776 + 361798441 = 19076^2 + 19021^2 .

It is a cyclic number.

It is not a de Polignac number, because 725692217 - 2⁸ = 725691961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (725692117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362846108 + 362846109.

It is an arithmetic number, because the mean of its divisors is an integer number (362846109).

Almost surely, 2^725692217 is an apocalyptic number.

It is an amenable number.

725692217 is a deficient number, since it is larger than the sum of its proper divisors (1).

725692217 is an equidigital number, since it uses as much as digits as its factorization.

725692217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 725692217 is about 26938.6751158998. The cubic root of 725692217 is about 898.6367083996.

The spelling of 725692217 in words is "seven hundred twenty-five million, six hundred ninety-two thousand, two hundred seventeen".