397783265 has 12 divisors (see below), whose sum is σ = 524680212. Its totient is φ = 289296480.

The previous prime is 397783247. The next prime is 397783279. The reversal of 397783265 is 562387793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161976529 + 235806736 = 12727^2 + 15356^2 .

It is not a de Polignac number, because 397783265 - 2⁶ = 397783201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328142 + ... + 329351.

It is an arithmetic number, because the mean of its divisors is an integer number (43723351).

Almost surely, 2^397783265 is an apocalyptic number.

It is an amenable number.

397783265 is a deficient number, since it is larger than the sum of its proper divisors (126896947).

397783265 is a wasteful number, since it uses less digits than its factorization.

397783265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657520 (or 657509 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The square root of 397783265 is about 19944.5046316022. The cubic root of 397783265 is about 735.4426907234.

The spelling of 397783265 in words is "three hundred ninety-seven million, seven hundred eighty-three thousand, two hundred sixty-five".