139721170 has 16 divisors (see below), whose sum is σ = 251642880. Its totient is φ = 55856304.

The previous prime is 139721161. The next prime is 139721191. The reversal of 139721170 is 71127931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22639 + ... + 28141.

It is an arithmetic number, because the mean of its divisors is an integer number (15727680).

Almost surely, 2^139721170 is an apocalyptic number.

139721170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139721170 is a deficient number, since it is larger than the sum of its proper divisors (111921710).

139721170 is a wasteful number, since it uses less digits than its factorization.

139721170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8049.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 139721170 is about 11820.3709755659. The cubic root of 139721170 is about 518.9044612857.

The spelling of 139721170 in words is "one hundred thirty-nine million, seven hundred twenty-one thousand, one hundred seventy".