34399991 has 2 divisors, whose sum is σ = 34399992. Its totient is φ = 34399990.

The previous prime is 34399921. The next prime is 34399999. The reversal of 34399991 is 19999343.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34399991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34399999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17199995 + 17199996.

It is an arithmetic number, because the mean of its divisors is an integer number (17199996).

Almost surely, 2^34399991 is an apocalyptic number.

34399991 is a deficient number, since it is larger than the sum of its proper divisors (1).

34399991 is an equidigital number, since it uses as much as digits as its factorization.

34399991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 47.

The square root of 34399991 is about 5865.1505522024. The cubic root of 34399991 is about 325.2266379730.

The spelling of 34399991 in words is "thirty-four million, three hundred ninety-nine thousand, nine hundred ninety-one".