139720079 has 2 divisors, whose sum is σ = 139720080. Its totient is φ = 139720078.

The previous prime is 139720039. The next prime is 139720123. The reversal of 139720079 is 970027931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139720079 - 2⁸ = 139719823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139720019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69860039 + 69860040.

It is an arithmetic number, because the mean of its divisors is an integer number (69860040).

Almost surely, 2^139720079 is an apocalyptic number.

139720079 is a deficient number, since it is larger than the sum of its proper divisors (1).

139720079 is an equidigital number, since it uses as much as digits as its factorization.

139720079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 139720079 is about 11820.3248263320. The cubic root of 139720079 is about 518.9031106761.

The spelling of 139720079 in words is "one hundred thirty-nine million, seven hundred twenty thousand, seventy-nine".