9698995639 has 2 divisors, whose sum is σ = 9698995640. Its totient is φ = 9698995638.

The previous prime is 9698995613. The next prime is 9698995661. The reversal of 9698995639 is 9365998969.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9698995639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9698995679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4849497819 + 4849497820.

It is an arithmetic number, because the mean of its divisors is an integer number (4849497820).

Almost surely, 2^9698995639 is an apocalyptic number.

9698995639 is a deficient number, since it is larger than the sum of its proper divisors (1).

9698995639 is an equidigital number, since it uses as much as digits as its factorization.

9698995639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255091680, while the sum is 73.

The square root of 9698995639 is about 98483.4790155181. The cubic root of 9698995639 is about 2132.5976256864.

The spelling of 9698995639 in words is "nine billion, six hundred ninety-eight million, nine hundred ninety-five thousand, six hundred thirty-nine".