990250423139 has 2 divisors, whose sum is σ = 990250423140. Its totient is φ = 990250423138.

The previous prime is 990250423121. The next prime is 990250423171. The reversal of 990250423139 is 931324052099.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990250423139 is a prime.

It is a super-2 number, since 2×990250423139² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 990250423093 and 990250423102.

It is not a weakly prime, because it can be changed into another prime (990250423109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495125211569 + 495125211570.

It is an arithmetic number, because the mean of its divisors is an integer number (495125211570).

Almost surely, 2^990250423139 is an apocalyptic number.

990250423139 is a deficient number, since it is larger than the sum of its proper divisors (1).

990250423139 is an equidigital number, since it uses as much as digits as its factorization.

990250423139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 990250423139 in words is "nine hundred ninety billion, two hundred fifty million, four hundred twenty-three thousand, one hundred thirty-nine".