399214271 has 2 divisors, whose sum is σ = 399214272. Its totient is φ = 399214270.

The previous prime is 399214241. The next prime is 399214273. The reversal of 399214271 is 172412993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399214271 - 2²⁶ = 332105407 is a prime.

It is a super-2 number, since 2×399214271² = 318744068340122882, which contains 22 as substring.

Together with 399214273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399214273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199607135 + 199607136.

It is an arithmetic number, because the mean of its divisors is an integer number (199607136).

Almost surely, 2^399214271 is an apocalyptic number.

399214271 is a deficient number, since it is larger than the sum of its proper divisors (1).

399214271 is an equidigital number, since it uses as much as digits as its factorization.

399214271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 399214271 is about 19980.3471191068. The cubic root of 399214271 is about 736.3235417616.

The spelling of 399214271 in words is "three hundred ninety-nine million, two hundred fourteen thousand, two hundred seventy-one".