397901206 has 4 divisors (see below), whose sum is σ = 596851812. Its totient is φ = 198950602.

The previous prime is 397901197. The next prime is 397901209. The reversal of 397901206 is 602109793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602109793 = 571 ⋅1054483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397901209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99475300 + ... + 99475303.

It is an arithmetic number, because the mean of its divisors is an integer number (149212953).

Almost surely, 2^397901206 is an apocalyptic number.

397901206 is a deficient number, since it is larger than the sum of its proper divisors (198950606).

397901206 is a wasteful number, since it uses less digits than its factorization.

397901206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198950605.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 397901206 is about 19947.4611417092. The cubic root of 397901206 is about 735.5153687225.

The spelling of 397901206 in words is "three hundred ninety-seven million, nine hundred one thousand, two hundred six".