397814813 has 8 divisors (see below), whose sum is σ = 434449440. Its totient is φ = 361258480.

The previous prime is 397814797. The next prime is 397814819. The reversal of 397814813 is 318418793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397814813 - 2⁴ = 397814797 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 (397814819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8678 + ... + 29511.

It is an arithmetic number, because the mean of its divisors is an integer number (54306180).

Almost surely, 2^397814813 is an apocalyptic number.

It is an amenable number.

397814813 is a deficient number, since it is larger than the sum of its proper divisors (36634627).

397814813 is a wasteful number, since it uses less digits than its factorization.

397814813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39147.

The product of its digits is 145152, while the sum is 44.

The square root of 397814813 is about 19945.2955104706. The cubic root of 397814813 is about 735.4621327452.

The spelling of 397814813 in words is "three hundred ninety-seven million, eight hundred fourteen thousand, eight hundred thirteen".