725867191 has 8 divisors (see below), whose sum is σ = 831019904. Its totient is φ = 621078840.

The previous prime is 725867167. The next prime is 725867269. The reversal of 725867191 is 191768527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725867191 - 2⁵ = 725867159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725867101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86805 + ... + 94798.

It is an arithmetic number, because the mean of its divisors is an integer number (103877488).

Almost surely, 2^725867191 is an apocalyptic number.

725867191 is a deficient number, since it is larger than the sum of its proper divisors (105152713).

725867191 is a wasteful number, since it uses less digits than its factorization.

725867191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182181.

The product of its digits is 211680, while the sum is 46.

The square root of 725867191 is about 26941.9225557494. The cubic root of 725867191 is about 898.7089269977.

The spelling of 725867191 in words is "seven hundred twenty-five million, eight hundred sixty-seven thousand, one hundred ninety-one".