34890391 has 2 divisors, whose sum is σ = 34890392. Its totient is φ = 34890390.

The previous prime is 34890367. The next prime is 34890419. The reversal of 34890391 is 19309843.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 34890391 - 2¹⁹ = 34366103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34890391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34890301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17445195 + 17445196.

It is an arithmetic number, because the mean of its divisors is an integer number (17445196).

Almost surely, 2^34890391 is an apocalyptic number.

34890391 is a deficient number, since it is larger than the sum of its proper divisors (1).

34890391 is an equidigital number, since it uses as much as digits as its factorization.

34890391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 34890391 is about 5906.8088677390. The cubic root of 34890391 is about 326.7648088892.

The spelling of 34890391 in words is "thirty-four million, eight hundred ninety thousand, three hundred ninety-one".