139802709 has 8 divisors (see below), whose sum is σ = 186504352. Its totient is φ = 93151440.

The previous prime is 139802701. The next prime is 139802723. The reversal of 139802709 is 907208931.

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

It is not a de Polignac number, because 139802709 - 2³ = 139802701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139802701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5554 + ... + 17619.

It is an arithmetic number, because the mean of its divisors is an integer number (23313044).

Almost surely, 2^139802709 is an apocalyptic number.

It is an amenable number.

139802709 is a deficient number, since it is larger than the sum of its proper divisors (46701643).

139802709 is a wasteful number, since it uses less digits than its factorization.

139802709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25187.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 139802709 is about 11823.8195605312. The cubic root of 139802709 is about 519.0053830546.

The spelling of 139802709 in words is "one hundred thirty-nine million, eight hundred two thousand, seven hundred nine".