139701791 has 4 divisors (see below), whose sum is σ = 139725432. Its totient is φ = 139678152.

The previous prime is 139701763. The next prime is 139701823. The reversal of 139701791 is 197107931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 139701791 - 2¹⁰ = 139700767 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 (139701761) 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, 5756 + ... + 17678.

It is an arithmetic number, because the mean of its divisors is an integer number (34931358).

Almost surely, 2^139701791 is an apocalyptic number.

139701791 is a deficient number, since it is larger than the sum of its proper divisors (23641).

139701791 is a wasteful number, since it uses less digits than its factorization.

139701791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23640.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 139701791 is about 11819.5512182147. The cubic root of 139701791 is about 518.8804698975.

The spelling of 139701791 in words is "one hundred thirty-nine million, seven hundred one thousand, seven hundred ninety-one".