34396721 has 2 divisors, whose sum is σ = 34396722. Its totient is φ = 34396720.

The previous prime is 34396711. The next prime is 34396723. The reversal of 34396721 is 12769343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34339600 + 57121 = 5860^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 34396721 - 2⁶ = 34396657 is a prime.

It is a Sophie Germain prime.

Together with 34396723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (34396723) 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, 17198360 + 17198361.

It is an arithmetic number, because the mean of its divisors is an integer number (17198361).

Almost surely, 2^34396721 is an apocalyptic number.

It is an amenable number.

34396721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34396721 is an equidigital number, since it uses as much as digits as its factorization.

34396721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 34396721 is about 5864.8717803546. The cubic root of 34396721 is about 325.2163324974.

The spelling of 34396721 in words is "thirty-four million, three hundred ninety-six thousand, seven hundred twenty-one".