139317771 has 8 divisors (see below), whose sum is σ = 196683984. Its totient is φ = 87415040.

The previous prime is 139317767. The next prime is 139317781. The reversal of 139317771 is 177713931.

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

It is a cyclic number.

It is not a de Polignac number, because 139317771 - 2² = 139317767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139317781) 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, 1365810 + ... + 1365911.

It is an arithmetic number, because the mean of its divisors is an integer number (24585498).

Almost surely, 2^139317771 is an apocalyptic number.

139317771 is a deficient number, since it is larger than the sum of its proper divisors (57366213).

139317771 is a wasteful number, since it uses less digits than its factorization.

139317771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731741.

The product of its digits is 27783, while the sum is 39.

The square root of 139317771 is about 11803.2949213345. The cubic root of 139317771 is about 518.4045911576.

The spelling of 139317771 in words is "one hundred thirty-nine million, three hundred seventeen thousand, seven hundred seventy-one".