138291369 has 8 divisors (see below), whose sum is σ = 184830240. Its totient is φ = 91973376.

The previous prime is 138291323. The next prime is 138291371. The reversal of 138291369 is 963192831.

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

It is not a de Polignac number, because 138291369 - 2⁸ = 138291113 is a prime.

It is a super-2 number, since 2×138291369² = 38249005479788322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138291369.

It is not an unprimeable number, because it can be changed into a prime (138292369) 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, 53752 + ... + 56265.

It is an arithmetic number, because the mean of its divisors is an integer number (23103780).

Almost surely, 2^138291369 is an apocalyptic number.

It is an amenable number.

138291369 is a deficient number, since it is larger than the sum of its proper divisors (46538871).

138291369 is a wasteful number, since it uses less digits than its factorization.

138291369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110439.

The product of its digits is 69984, while the sum is 42.

The square root of 138291369 is about 11759.7350735465. The cubic root of 138291369 is about 517.1283634839.

The spelling of 138291369 in words is "one hundred thirty-eight million, two hundred ninety-one thousand, three hundred sixty-nine".