139720077 has 12 divisors (see below), whose sum is σ = 230649120. Its totient is φ = 79840008.

The previous prime is 139720039. The next prime is 139720079. The reversal of 139720077 is 770027931.

It is not a de Polignac number, because 139720077 - 2⁶ = 139720013 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1108827 + ... + 1108952.

It is an arithmetic number, because the mean of its divisors is an integer number (19220760).

Almost surely, 2^139720077 is an apocalyptic number.

It is an amenable number.

139720077 is a deficient number, since it is larger than the sum of its proper divisors (90929043).

139720077 is a wasteful number, since it uses less digits than its factorization.

139720077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217792 (or 2217789 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 139720077 is about 11820.3247417319. The cubic root of 139720077 is about 518.9031082002.

The spelling of 139720077 in words is "one hundred thirty-nine million, seven hundred twenty thousand, seventy-seven".