34720657987 has 2 divisors, whose sum is σ = 34720657988. Its totient is φ = 34720657986.

The previous prime is 34720657981. The next prime is 34720658041. The reversal of 34720657987 is 78975602743.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34720657987 is a prime.

It is not a weakly prime, because it can be changed into another prime (34720657981) 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, 17360328993 + 17360328994.

It is an arithmetic number, because the mean of its divisors is an integer number (17360328994).

Almost surely, 2^34720657987 is an apocalyptic number.

34720657987 is a deficient number, since it is larger than the sum of its proper divisors (1).

34720657987 is an equidigital number, since it uses as much as digits as its factorization.

34720657987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17781120, while the sum is 58.

The spelling of 34720657987 in words is "thirty-four billion, seven hundred twenty million, six hundred fifty-seven thousand, nine hundred eighty-seven".