139720078 has 8 divisors (see below), whose sum is σ = 218692368. Its totient is φ = 66822624.

The previous prime is 139720039. The next prime is 139720079. The reversal of 139720078 is 870027931.

139720078 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139720079) 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, 1518651 + ... + 1518742.

It is an arithmetic number, because the mean of its divisors is an integer number (27336546).

Almost surely, 2^139720078 is an apocalyptic number.

139720078 is a deficient number, since it is larger than the sum of its proper divisors (78972290).

139720078 is a wasteful number, since it uses less digits than its factorization.

139720078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037418.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 139720078 is about 11820.3247840320. The cubic root of 139720078 is about 518.9031094382.

The spelling of 139720078 in words is "one hundred thirty-nine million, seven hundred twenty thousand, seventy-eight".