139172068 has 24 divisors (see below), whose sum is σ = 278718272. Its totient is φ = 59565024.

The previous prime is 139172063. The next prime is 139172069. The reversal of 139172068 is 860271931.

It is a super-2 number, since 2×139172068² = 38737729022793248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139172063) 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, 20971 + ... + 26797.

Almost surely, 2^139172068 is an apocalyptic number.

It is an amenable number.

139172068 is an abundant number, since it is smaller than the sum of its proper divisors (139546204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139172068 is a wasteful number, since it uses less digits than its factorization.

139172068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691 (or 6689 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 139172068 is about 11797.1211742526. The cubic root of 139172068 is about 518.2238067284.

The spelling of 139172068 in words is "one hundred thirty-nine million, one hundred seventy-two thousand, sixty-eight".