34749721 has 2 divisors, whose sum is σ = 34749722. Its totient is φ = 34749720.

The previous prime is 34749709. The next prime is 34749731. The reversal of 34749721 is 12794743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 9859600 = 4989^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 34749721 - 2⁷ = 34749593 is a prime.

It is not a weakly prime, because it can be changed into another prime (34749731) 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, 17374860 + 17374861.

It is an arithmetic number, because the mean of its divisors is an integer number (17374861).

Almost surely, 2^34749721 is an apocalyptic number.

It is an amenable number.

34749721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34749721 is an equidigital number, since it uses as much as digits as its factorization.

34749721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 34749721 is about 5894.8893967572. The cubic root of 34749721 is about 326.3250706321.

The spelling of 34749721 in words is "thirty-four million, seven hundred forty-nine thousand, seven hundred twenty-one".