9641879399 has 2 divisors, whose sum is σ = 9641879400. Its totient is φ = 9641879398.

The previous prime is 9641879393. The next prime is 9641879407. The reversal of 9641879399 is 9939781469.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9641879399 - 2⁴ = 9641879383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9641879393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820939699 + 4820939700.

It is an arithmetic number, because the mean of its divisors is an integer number (4820939700).

Almost surely, 2^9641879399 is an apocalyptic number.

9641879399 is a deficient number, since it is larger than the sum of its proper divisors (1).

9641879399 is an equidigital number, since it uses as much as digits as its factorization.

9641879399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 65.

The square root of 9641879399 is about 98193.0720519528. The cubic root of 9641879399 is about 2128.4031761447.

The spelling of 9641879399 in words is "nine billion, six hundred forty-one million, eight hundred seventy-nine thousand, three hundred ninety-nine".