34720513 has 2 divisors, whose sum is σ = 34720514. Its totient is φ = 34720512.

The previous prime is 34720457. The next prime is 34720519. The reversal of 34720513 is 31502743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34374769 + 345744 = 5863^2 + 588^2 .

It is an emirp because it is prime and its reverse (31502743) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34720513 is a prime.

It is not a weakly prime, because it can be changed into another prime (34720519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17360256 + 17360257.

It is an arithmetic number, because the mean of its divisors is an integer number (17360257).

Almost surely, 2^34720513 is an apocalyptic number.

It is an amenable number.

34720513 is a deficient number, since it is larger than the sum of its proper divisors (1).

34720513 is an equidigital number, since it uses as much as digits as its factorization.

34720513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 34720513 is about 5892.4114757882. The cubic root of 34720513 is about 326.2336169066.

The spelling of 34720513 in words is "thirty-four million, seven hundred twenty thousand, five hundred thirteen".