139199079 has 4 divisors (see below), whose sum is σ = 185598776. Its totient is φ = 92799384.

The previous prime is 139199057. The next prime is 139199089. The reversal of 139199079 is 970991931.

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

It is not a de Polignac number, because 139199079 - 2⁸ = 139198823 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 (139199029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23199844 + ... + 23199849.

It is an arithmetic number, because the mean of its divisors is an integer number (46399694).

Almost surely, 2^139199079 is an apocalyptic number.

139199079 is a deficient number, since it is larger than the sum of its proper divisors (46399697).

139199079 is an equidigital number, since it uses as much as digits as its factorization.

139199079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46399696.

The product of its (nonzero) digits is 137781, while the sum is 48.

The square root of 139199079 is about 11798.2659319071. The cubic root of 139199079 is about 518.2573307872.

The spelling of 139199079 in words is "one hundred thirty-nine million, one hundred ninety-nine thousand, seventy-nine".