139879511 has 2 divisors, whose sum is σ = 139879512. Its totient is φ = 139879510.

The previous prime is 139879507. The next prime is 139879541. The reversal of 139879511 is 115978931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139879511 - 2² = 139879507 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139879541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69939755 + 69939756.

It is an arithmetic number, because the mean of its divisors is an integer number (69939756).

Almost surely, 2^139879511 is an apocalyptic number.

139879511 is a deficient number, since it is larger than the sum of its proper divisors (1).

139879511 is an equidigital number, since it uses as much as digits as its factorization.

139879511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 44.

The square root of 139879511 is about 11827.0668806767. The cubic root of 139879511 is about 519.1004059018.

The spelling of 139879511 in words is "one hundred thirty-nine million, eight hundred seventy-nine thousand, five hundred eleven".