139879589 has 2 divisors, whose sum is σ = 139879590. Its totient is φ = 139879588.

The previous prime is 139879547. The next prime is 139879613. The reversal of 139879589 is 985978931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 44328964 = 9775^2 + 6658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139879589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139879489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69939794 + 69939795.

It is an arithmetic number, because the mean of its divisors is an integer number (69939795).

Almost surely, 2^139879589 is an apocalyptic number.

It is an amenable number.

139879589 is a deficient number, since it is larger than the sum of its proper divisors (1).

139879589 is an equidigital number, since it uses as much as digits as its factorization.

139879589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 59.

The square root of 139879589 is about 11827.0701781971. The cubic root of 139879589 is about 519.1005023892.

The spelling of 139879589 in words is "one hundred thirty-nine million, eight hundred seventy-nine thousand, five hundred eighty-nine".