9808542979 has 2 divisors, whose sum is σ = 9808542980. Its totient is φ = 9808542978.

The previous prime is 9808542973. The next prime is 9808543001. The reversal of 9808542979 is 9792458089.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9808542979 - 2¹⁹ = 9808018691 is a prime.

It is not a weakly prime, because it can be changed into another prime (9808542973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4904271489 + 4904271490.

It is an arithmetic number, because the mean of its divisors is an integer number (4904271490).

Almost surely, 2^9808542979 is an apocalyptic number.

9808542979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9808542979 is an equidigital number, since it uses as much as digits as its factorization.

9808542979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The square root of 9808542979 is about 99038.0885265866. The cubic root of 9808542979 is about 2140.5966091389.

The spelling of 9808542979 in words is "nine billion, eight hundred eight million, five hundred forty-two thousand, nine hundred seventy-nine".