138968170 has 16 divisors (see below), whose sum is σ = 272883168. Its totient is φ = 50533840.

The previous prime is 138968153. The next prime is 138968171. The reversal of 138968170 is 71869831.

It is not an unprimeable number, because it can be changed into a prime (138968171) 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, 631564 + ... + 631783.

It is an arithmetic number, because the mean of its divisors is an integer number (17055198).

Almost surely, 2^138968170 is an apocalyptic number.

138968170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138968170 is a deficient number, since it is larger than the sum of its proper divisors (133914998).

138968170 is a wasteful number, since it uses less digits than its factorization.

138968170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263365.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 138968170 is about 11788.4761525822. The cubic root of 138968170 is about 517.9706035205.

The spelling of 138968170 in words is "one hundred thirty-eight million, nine hundred sixty-eight thousand, one hundred seventy".