139415123 has 2 divisors, whose sum is σ = 139415124. Its totient is φ = 139415122.

The previous prime is 139415117. The next prime is 139415131. The reversal of 139415123 is 321514931.

139415123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139415123 - 2⁸ = 139414867 is a prime.

It is a super-2 number, since 2×139415123² = 38873153042210258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139415723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69707561 + 69707562.

It is an arithmetic number, because the mean of its divisors is an integer number (69707562).

Almost surely, 2^139415123 is an apocalyptic number.

139415123 is a deficient number, since it is larger than the sum of its proper divisors (1).

139415123 is an equidigital number, since it uses as much as digits as its factorization.

139415123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 139415123 is about 11807.4181343764. The cubic root of 139415123 is about 518.5253127107.

The spelling of 139415123 in words is "one hundred thirty-nine million, four hundred fifteen thousand, one hundred twenty-three".