393427225 has 9 divisors (see below), whose sum is σ = 487972767. Its totient is φ = 314662440.

The previous prime is 393427207. The next prime is 393427249. The reversal of 393427225 is 522724393.

The square root of 393427225 is 19835.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 141633801 + 251793424 = 11901^2 + 15868^2 .

It is a de Polignac number, because none of the positive numbers 2^k-393427225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 97192 + ... + 101158.

Almost surely, 2^393427225 is an apocalyptic number.

393427225 is the 19835-th square number.

393427225 is the 9918-th centered octagonal number.

It is an amenable number.

393427225 is a deficient number, since it is larger than the sum of its proper divisors (94545542).

393427225 is an frugal number, since it uses more digits than its factorization.

393427225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944 (or 3972 counting only the distinct ones).

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

The cubic root of 393427225 is about 732.7482724520.

The spelling of 393427225 in words is "three hundred ninety-three million, four hundred twenty-seven thousand, two hundred twenty-five".