397472373917 has 4 divisors (see below), whose sum is σ = 397474432380. Its totient is φ = 397470315456.

The previous prime is 397472373901. The next prime is 397472373931. The reversal of 397472373917 is 719373274793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216570167641 + 180902206276 = 465371^2 + 425326^2 .

It is a cyclic number.

It is not a de Polignac number, because 397472373917 - 2⁴ = 397472373901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397472373917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397472373017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705692 + ... + 1137077.

It is an arithmetic number, because the mean of its divisors is an integer number (99368608095).

Almost surely, 2^397472373917 is an apocalyptic number.

It is an amenable number.

397472373917 is a deficient number, since it is larger than the sum of its proper divisors (2058463).

397472373917 is a wasteful number, since it uses less digits than its factorization.

397472373917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058462.

The product of its digits is 42007896, while the sum is 62.

The spelling of 397472373917 in words is "three hundred ninety-seven billion, four hundred seventy-two million, three hundred seventy-three thousand, nine hundred seventeen".