725322394 has 4 divisors (see below), whose sum is σ = 1087983594. Its totient is φ = 362661196.

The previous prime is 725322383. The next prime is 725322401. The reversal of 725322394 is 493223527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 536617225 + 188705169 = 23165^2 + 13737^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181330597 + ... + 181330600.

Almost surely, 2^725322394 is an apocalyptic number.

725322394 is a deficient number, since it is larger than the sum of its proper divisors (362661200).

725322394 is a wasteful number, since it uses less digits than its factorization.

725322394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362661199.

The product of its digits is 90720, while the sum is 37.

The square root of 725322394 is about 26931.8100765619. The cubic root of 725322394 is about 898.4840298094.

The spelling of 725322394 in words is "seven hundred twenty-five million, three hundred twenty-two thousand, three hundred ninety-four".