39998105149 has 2 divisors, whose sum is σ = 39998105150. Its totient is φ = 39998105148.

The previous prime is 39998105117. The next prime is 39998105179. The reversal of 39998105149 is 94150189993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28483312900 + 11514792249 = 168770^2 + 107307^2 .

It is a cyclic number.

It is not a de Polignac number, because 39998105149 - 2⁵ = 39998105117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39998105093 and 39998105102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39998105179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19999052574 + 19999052575.

It is an arithmetic number, because the mean of its divisors is an integer number (19999052575).

Almost surely, 2^39998105149 is an apocalyptic number.

It is an amenable number.

39998105149 is a deficient number, since it is larger than the sum of its proper divisors (1).

39998105149 is an equidigital number, since it uses as much as digits as its factorization.

39998105149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 58.

The spelling of 39998105149 in words is "thirty-nine billion, nine hundred ninety-eight million, one hundred five thousand, one hundred forty-nine".