101718139 has 2 divisors, whose sum is σ = 101718140. Its totient is φ = 101718138.

The previous prime is 101718131. The next prime is 101718163. The reversal of 101718139 is 931817101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101718139 - 2³ = 101718131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101718139.

It is not a weakly prime, because it can be changed into another prime (101718131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50859069 + 50859070.

It is an arithmetic number, because the mean of its divisors is an integer number (50859070).

Almost surely, 2^101718139 is an apocalyptic number.

101718139 is a deficient number, since it is larger than the sum of its proper divisors (1).

101718139 is an equidigital number, since it uses as much as digits as its factorization.

101718139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 101718139 is about 10085.5410861292. The cubic root of 101718139 is about 466.8021008837.

The spelling of 101718139 in words is "one hundred one million, seven hundred eighteen thousand, one hundred thirty-nine".