139230079 has 4 divisors (see below), whose sum is σ = 139288984. Its totient is φ = 139171176.

The previous prime is 139230061. The next prime is 139230097. The reversal of 139230079 is 970032931.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (139230061) and next prime (139230097).

It is a cyclic number.

It is not a de Polignac number, because 139230079 - 2²¹ = 137132927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139230019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25752 + ... + 30685.

It is an arithmetic number, because the mean of its divisors is an integer number (34822246).

Almost surely, 2^139230079 is an apocalyptic number.

139230079 is a deficient number, since it is larger than the sum of its proper divisors (58905).

139230079 is an equidigital number, since it uses as much as digits as its factorization.

139230079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58904.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 139230079 is about 11799.5796111556. The cubic root of 139230079 is about 518.2958003539.

The spelling of 139230079 in words is "one hundred thirty-nine million, two hundred thirty thousand, seventy-nine".