139914989 has 2 divisors, whose sum is σ = 139914990. Its totient is φ = 139914988.

The previous prime is 139914979. The next prime is 139915021. The reversal of 139914989 is 989419931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136492489 + 3422500 = 11683^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 139914989 - 2¹² = 139910893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139914989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139914959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69957494 + 69957495.

It is an arithmetic number, because the mean of its divisors is an integer number (69957495).

Almost surely, 2^139914989 is an apocalyptic number.

It is an amenable number.

139914989 is a deficient number, since it is larger than the sum of its proper divisors (1).

139914989 is an equidigital number, since it uses as much as digits as its factorization.

139914989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 53.

The square root of 139914989 is about 11828.5666502751. The cubic root of 139914989 is about 519.1442891154.

The spelling of 139914989 in words is "one hundred thirty-nine million, nine hundred fourteen thousand, nine hundred eighty-nine".