139706123 has 2 divisors, whose sum is σ = 139706124. Its totient is φ = 139706122.

The previous prime is 139706111. The next prime is 139706141. The reversal of 139706123 is 321607931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139706123 is a prime.

It is a super-2 number, since 2×139706123² = 39035601607382258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139706123.

It is not a weakly prime, because it can be changed into another prime (139706143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69853061 + 69853062.

It is an arithmetic number, because the mean of its divisors is an integer number (69853062).

Almost surely, 2^139706123 is an apocalyptic number.

139706123 is a deficient number, since it is larger than the sum of its proper divisors (1).

139706123 is an equidigital number, since it uses as much as digits as its factorization.

139706123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 139706123 is about 11819.7344724829. The cubic root of 139706123 is about 518.8858331476.

The spelling of 139706123 in words is "one hundred thirty-nine million, seven hundred six thousand, one hundred twenty-three".