34973015921 has 2 divisors, whose sum is σ = 34973015922. Its totient is φ = 34973015920.

The previous prime is 34973015911. The next prime is 34973015947. The reversal of 34973015921 is 12951037943.

34973015921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28769248225 + 6203767696 = 169615^2 + 78764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34973015921 is a prime.

It is a super-2 number, since 2×34973015921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (34973015911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17486507960 + 17486507961.

It is an arithmetic number, because the mean of its divisors is an integer number (17486507961).

Almost surely, 2^34973015921 is an apocalyptic number.

It is an amenable number.

34973015921 is a deficient number, since it is larger than the sum of its proper divisors (1).

34973015921 is an equidigital number, since it uses as much as digits as its factorization.

34973015921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 34973015921 in words is "thirty-four billion, nine hundred seventy-three million, fifteen thousand, nine hundred twenty-one".