34536721 has 2 divisors, whose sum is σ = 34536722. Its totient is φ = 34536720.

The previous prime is 34536713. The next prime is 34536727. The reversal of 34536721 is 12763543.

34536721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31764496 + 2772225 = 5636^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 34536721 - 2³ = 34536713 is a prime.

It is not a weakly prime, because it can be changed into another prime (34536727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17268360 + 17268361.

It is an arithmetic number, because the mean of its divisors is an integer number (17268361).

Almost surely, 2^34536721 is an apocalyptic number.

It is an amenable number.

34536721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34536721 is an equidigital number, since it uses as much as digits as its factorization.

34536721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 31.

The square root of 34536721 is about 5876.7951300007. The cubic root of 34536721 is about 325.6569622314.

The spelling of 34536721 in words is "thirty-four million, five hundred thirty-six thousand, seven hundred twenty-one".