397912977271 has 2 divisors, whose sum is σ = 397912977272. Its totient is φ = 397912977270.

The previous prime is 397912977157. The next prime is 397912977299. The reversal of 397912977271 is 172779219793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397912977271 - 2²⁹ = 397376106359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397912977071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198956488635 + 198956488636.

It is an arithmetic number, because the mean of its divisors is an integer number (198956488636).

Almost surely, 2^397912977271 is an apocalyptic number.

397912977271 is a deficient number, since it is larger than the sum of its proper divisors (1).

397912977271 is an equidigital number, since it uses as much as digits as its factorization.

397912977271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21003948, while the sum is 64.

The spelling of 397912977271 in words is "three hundred ninety-seven billion, nine hundred twelve million, nine hundred seventy-seven thousand, two hundred seventy-one".