34399621 has 2 divisors, whose sum is σ = 34399622. Its totient is φ = 34399620.

The previous prime is 34399591. The next prime is 34399643. The reversal of 34399621 is 12699343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31472100 + 2927521 = 5610^2 + 1711^2 .

It is an emirp because it is prime and its reverse (12699343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34399621 - 2¹³ = 34391429 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 (34399921) 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, 17199810 + 17199811.

It is an arithmetic number, because the mean of its divisors is an integer number (17199811).

Almost surely, 2^34399621 is an apocalyptic number.

It is an amenable number.

34399621 is a deficient number, since it is larger than the sum of its proper divisors (1).

34399621 is an equidigital number, since it uses as much as digits as its factorization.

34399621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 34399621 is about 5865.1190098752. The cubic root of 34399621 is about 325.2254719428.

The spelling of 34399621 in words is "thirty-four million, three hundred ninety-nine thousand, six hundred twenty-one".