397078017 has 24 divisors (see below), whose sum is σ = 648295200. Its totient is φ = 214958016.

The previous prime is 397078013. The next prime is 397078021. The reversal of 397078017 is 710870793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397078013) and next prime (397078021).

It is not a de Polignac number, because 397078017 - 2² = 397078013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397078017.

It is not an unprimeable number, because it can be changed into a prime (397078013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68292 + ... + 73877.

It is an arithmetic number, because the mean of its divisors is an integer number (27012300).

Almost surely, 2^397078017 is an apocalyptic number.

It is an amenable number.

397078017 is a deficient number, since it is larger than the sum of its proper divisors (251217183).

397078017 is a wasteful number, since it uses less digits than its factorization.

397078017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142205 (or 142198 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 397078017 is about 19926.8165294911. The cubic root of 397078017 is about 735.0078003707.

The spelling of 397078017 in words is "three hundred ninety-seven million, seventy-eight thousand, seventeen".