101998439 has 2 divisors, whose sum is σ = 101998440. Its totient is φ = 101998438.

The previous prime is 101998411. The next prime is 101998469. The reversal of 101998439 is 934899101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101998439 - 2²⁴ = 85221223 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101998439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101998409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50999219 + 50999220.

It is an arithmetic number, because the mean of its divisors is an integer number (50999220).

Almost surely, 2^101998439 is an apocalyptic number.

101998439 is a deficient number, since it is larger than the sum of its proper divisors (1).

101998439 is an equidigital number, since it uses as much as digits as its factorization.

101998439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 101998439 is about 10099.4276570507. The cubic root of 101998439 is about 467.2304893250.

The spelling of 101998439 in words is "one hundred one million, nine hundred ninety-eight thousand, four hundred thirty-nine".