34291721 has 2 divisors, whose sum is σ = 34291722. Its totient is φ = 34291720.

The previous prime is 34291709. The next prime is 34291729. The reversal of 34291721 is 12719243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22458121 + 11833600 = 4739^2 + 3440^2 .

It is an emirp because it is prime and its reverse (12719243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34291721 - 2⁶ = 34291657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (34291729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17145860 + 17145861.

It is an arithmetic number, because the mean of its divisors is an integer number (17145861).

Almost surely, 2^34291721 is an apocalyptic number.

It is an amenable number.

34291721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34291721 is an equidigital number, since it uses as much as digits as its factorization.

34291721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 34291721 is about 5855.9133361074. The cubic root of 34291721 is about 324.8850749474.

The spelling of 34291721 in words is "thirty-four million, two hundred ninety-one thousand, seven hundred twenty-one".