9949992139 has 2 divisors, whose sum is σ = 9949992140. Its totient is φ = 9949992138.

The previous prime is 9949992137. The next prime is 9949992149. The reversal of 9949992139 is 9312999499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9949992139 - 2¹ = 9949992137 is a prime.

Together with 9949992137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9949992137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4974996069 + 4974996070.

It is an arithmetic number, because the mean of its divisors is an integer number (4974996070).

Almost surely, 2^9949992139 is an apocalyptic number.

9949992139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9949992139 is an equidigital number, since it uses as much as digits as its factorization.

9949992139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12754584, while the sum is 64.

The square root of 9949992139 is about 99749.6473126597. The cubic root of 9949992139 is about 2150.8373979048.

The spelling of 9949992139 in words is "nine billion, nine hundred forty-nine million, nine hundred ninety-two thousand, one hundred thirty-nine".