397316745 has 60 divisors (see below), whose sum is σ = 828550404. Its totient is φ = 181621440.

The previous prime is 397316723. The next prime is 397316761. The reversal of 397316745 is 547613793.

It can be written as a sum of positive squares in 2 ways, for example, as 68112009 + 329204736 = 8253^2 + 18144^2 .

It is not a de Polignac number, because 397316745 - 2⁵ = 397316713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 397316745.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 9835 + ... + 29855.

Almost surely, 2^397316745 is an apocalyptic number.

397316745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397316745 is an abundant number, since it is smaller than the sum of its proper divisors (431233659).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397316745 is a wasteful number, since it uses less digits than its factorization.

397316745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20052 (or 20036 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 397316745 is about 19932.8057483135. The cubic root of 397316745 is about 735.1550693222.

The spelling of 397316745 in words is "three hundred ninety-seven million, three hundred sixteen thousand, seven hundred forty-five".