397279407 has 16 divisors (see below), whose sum is σ = 617734400. Its totient is φ = 227016216.

The previous prime is 397279373. The next prime is 397279429. The reversal of 397279407 is 704972793.

It is a happy number.

It is not a de Polignac number, because 397279407 - 2¹² = 397275311 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 (397279507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192013 + ... + 194070.

It is an arithmetic number, because the mean of its divisors is an integer number (38608400).

Almost surely, 2^397279407 is an apocalyptic number.

397279407 is a deficient number, since it is larger than the sum of its proper divisors (220454993).

397279407 is an equidigital number, since it uses as much as digits as its factorization.

397279407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386107 (or 386093 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 48.

The square root of 397279407 is about 19931.8691296125. The cubic root of 397279407 is about 735.1320397702.

The spelling of 397279407 in words is "three hundred ninety-seven million, two hundred seventy-nine thousand, four hundred seven".