34520689639 has 2 divisors, whose sum is σ = 34520689640. Its totient is φ = 34520689638.

The previous prime is 34520689631. The next prime is 34520689663. The reversal of 34520689639 is 93698602543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 34520689639 - 2³ = 34520689631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34520689639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34520689631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17260344819 + 17260344820.

It is an arithmetic number, because the mean of its divisors is an integer number (17260344820).

Almost surely, 2^34520689639 is an apocalyptic number.

34520689639 is a deficient number, since it is larger than the sum of its proper divisors (1).

34520689639 is an equidigital number, since it uses as much as digits as its factorization.

34520689639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 34520689639 in words is "thirty-four billion, five hundred twenty million, six hundred eighty-nine thousand, six hundred thirty-nine".