139702079 has 16 divisors (see below), whose sum is σ = 160817280. Its totient is φ = 120022560.

The previous prime is 139702063. The next prime is 139702081. The reversal of 139702079 is 970207931.

It is a cyclic number.

It is not a de Polignac number, because 139702079 - 2⁴ = 139702063 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 (139702279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157772 + ... + 158654.

It is an arithmetic number, because the mean of its divisors is an integer number (10051080).

Almost surely, 2^139702079 is an apocalyptic number.

139702079 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139702079 is a deficient number, since it is larger than the sum of its proper divisors (21115201).

139702079 is a wasteful number, since it uses less digits than its factorization.

139702079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

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

The square root of 139702079 is about 11819.5634014121. The cubic root of 139702079 is about 518.8808264605.

The spelling of 139702079 in words is "one hundred thirty-nine million, seven hundred two thousand, seventy-nine".