139688311 has 8 divisors (see below), whose sum is σ = 161892864. Its totient is φ = 118046040.

The previous prime is 139688299. The next prime is 139688321. The reversal of 139688311 is 113886931.

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

It is not a de Polignac number, because 139688311 - 2⁵ = 139688279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139688321) 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, 140035 + ... + 141028.

It is an arithmetic number, because the mean of its divisors is an integer number (20236608).

Almost surely, 2^139688311 is an apocalyptic number.

139688311 is a deficient number, since it is larger than the sum of its proper divisors (22204553).

139688311 is an equidigital number, since it uses as much as digits as its factorization.

139688311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281141.

The product of its digits is 31104, while the sum is 40.

The square root of 139688311 is about 11818.9809628411. The cubic root of 139688311 is about 518.8637802195.

The spelling of 139688311 in words is "one hundred thirty-nine million, six hundred eighty-eight thousand, three hundred eleven".