138951169 has 8 divisors (see below), whose sum is σ = 163093568. Its totient is φ = 115881840.

The previous prime is 138951157. The next prime is 138951179. The reversal of 138951169 is 961159831.

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 138951169 - 2¹⁵ = 138918401 is a prime.

It is a super-2 number, since 2×138951169² = 38614854732933122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138951179) 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, 267987 + ... + 268504.

It is an arithmetic number, because the mean of its divisors is an integer number (20386696).

Almost surely, 2^138951169 is an apocalyptic number.

It is an amenable number.

138951169 is a deficient number, since it is larger than the sum of its proper divisors (24142399).

138951169 is an equidigital number, since it uses as much as digits as its factorization.

138951169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536535.

The product of its digits is 58320, while the sum is 43.

The square root of 138951169 is about 11787.7550449609. The cubic root of 138951169 is about 517.9494802725.

The spelling of 138951169 in words is "one hundred thirty-eight million, nine hundred fifty-one thousand, one hundred sixty-nine".