397917471249 has 27 divisors (see below), whose sum is σ = 577585213257. Its totient is φ = 263985159816.

The previous prime is 397917471227. The next prime is 397917471251. The reversal of 397917471249 is 942174719793.

The square root of 397917471249 is 630807.

It is a perfect power (a square), and thus also a powerful number.

397917471249 is a `hidden beast` number, since 39 + 7 + 91 + 7 + 471 + 2 + 49 = 666.

It is not a de Polignac number, because 397917471249 - 2⁷ = 397917471121 is a prime.

Its product of digits (24004512) is a multiple of the sum of its prime divisors (1029).

It is not an unprimeable number, because it can be changed into a prime (397917471209) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 535554772 + ... + 535555514.

Almost surely, 2^397917471249 is an apocalyptic number.

397917471249 is the 630807-th square number.

397917471249 is the 315404-th centered octagonal number.

It is an amenable number.

397917471249 is a deficient number, since it is larger than the sum of its proper divisors (179667742008).

397917471249 is an frugal number, since it uses more digits than its factorization.

397917471249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 1029 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 63.

The spelling of 397917471249 in words is "three hundred ninety-seven billion, nine hundred seventeen million, four hundred seventy-one thousand, two hundred forty-nine".