397129274 has 4 divisors (see below), whose sum is σ = 595693914. Its totient is φ = 198564636.

The previous prime is 397129261. The next prime is 397129297. The reversal of 397129274 is 472921793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 472921793 = 17 ⋅27818929.

It can be written as a sum of positive squares in only one way, i.e., 376942225 + 20187049 = 19415^2 + 4493^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99282317 + ... + 99282320.

Almost surely, 2^397129274 is an apocalyptic number.

397129274 is a deficient number, since it is larger than the sum of its proper divisors (198564640).

397129274 is a wasteful number, since it uses less digits than its factorization.

397129274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198564639.

The product of its digits is 190512, while the sum is 44.

The square root of 397129274 is about 19928.1026191657. The cubic root of 397129274 is about 735.0394252843.

The spelling of 397129274 in words is "three hundred ninety-seven million, one hundred twenty-nine thousand, two hundred seventy-four".