9900990139 has 2 divisors, whose sum is σ = 9900990140. Its totient is φ = 9900990138.

The previous prime is 9900990109. The next prime is 9900990163. The reversal of 9900990139 is 9310990099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9900990139 - 2⁵ = 9900990107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9900990092 and 9900990101.

It is not a weakly prime, because it can be changed into another prime (9900990109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950495069 + 4950495070.

It is an arithmetic number, because the mean of its divisors is an integer number (4950495070).

Almost surely, 2^9900990139 is an apocalyptic number.

9900990139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9900990139 is an equidigital number, since it uses as much as digits as its factorization.

9900990139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 177147, while the sum is 49.

The square root of 9900990139 is about 99503.7192219467. The cubic root of 9900990139 is about 2147.3007509875.

The spelling of 9900990139 in words is "nine billion, nine hundred million, nine hundred ninety thousand, one hundred thirty-nine".