34123391 has 2 divisors, whose sum is σ = 34123392. Its totient is φ = 34123390.

The previous prime is 34123351. The next prime is 34123393. The reversal of 34123391 is 19332143.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 34123391 - 2²² = 29929087 is a prime.

Together with 34123393, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34123391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34123393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17061695 + 17061696.

It is an arithmetic number, because the mean of its divisors is an integer number (17061696).

Almost surely, 2^34123391 is an apocalyptic number.

34123391 is a deficient number, since it is larger than the sum of its proper divisors (1).

34123391 is an equidigital number, since it uses as much as digits as its factorization.

34123391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 34123391 is about 5841.5230034641. The cubic root of 34123391 is about 324.3526079139.

It can be divided in two parts, 341 and 23391, that added together give a palindrome (23732).

The spelling of 34123391 in words is "thirty-four million, one hundred twenty-three thousand, three hundred ninety-one".