139606123 has 2 divisors, whose sum is σ = 139606124. Its totient is φ = 139606122.

The previous prime is 139606111. The next prime is 139606133. The reversal of 139606123 is 321606931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139606123 - 2¹⁷ = 139475051 is a prime.

It is a super-2 number, since 2×139606123² = 38979739158182258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139606133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69803061 + 69803062.

It is an arithmetic number, because the mean of its divisors is an integer number (69803062).

Almost surely, 2^139606123 is an apocalyptic number.

139606123 is a deficient number, since it is larger than the sum of its proper divisors (1).

139606123 is an equidigital number, since it uses as much as digits as its factorization.

139606123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 139606123 is about 11815.5035017556. The cubic root of 139606123 is about 518.7619994708.

The spelling of 139606123 in words is "one hundred thirty-nine million, six hundred six thousand, one hundred twenty-three".