139308879 has 8 divisors (see below), whose sum is σ = 188517760. Its totient is φ = 91486296.

The previous prime is 139308859. The next prime is 139308899. The reversal of 139308879 is 978803931.

It is an interprime number because it is at equal distance from previous prime (139308859) and next prime (139308899).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139308879 - 2⁸ = 139308623 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 (139308859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346339 + ... + 346740.

It is an arithmetic number, because the mean of its divisors is an integer number (23564720).

Almost surely, 2^139308879 is an apocalyptic number.

139308879 is a deficient number, since it is larger than the sum of its proper divisors (49208881).

139308879 is an equidigital number, since it uses as much as digits as its factorization.

139308879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693149.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 139308879 is about 11802.9182408420. The cubic root of 139308879 is about 518.3935618116.

The spelling of 139308879 in words is "one hundred thirty-nine million, three hundred eight thousand, eight hundred seventy-nine".