34398391 has 2 divisors, whose sum is σ = 34398392. Its totient is φ = 34398390.

The previous prime is 34398389. The next prime is 34398401. The reversal of 34398391 is 19389343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 34398391 - 2¹ = 34398389 is a prime.

Together with 34398389, 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 (34398311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17199195 + 17199196.

It is an arithmetic number, because the mean of its divisors is an integer number (17199196).

Almost surely, 2^34398391 is an apocalyptic number.

34398391 is a deficient number, since it is larger than the sum of its proper divisors (1).

34398391 is an equidigital number, since it uses as much as digits as its factorization.

34398391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 34398391 is about 5865.0141517306. The cubic root of 34398391 is about 325.2215956201.

The spelling of 34398391 in words is "thirty-four million, three hundred ninety-eight thousand, three hundred ninety-one".