138361619 has 8 divisors (see below), whose sum is σ = 151198320. Its totient is φ = 125568000.

The previous prime is 138361579. The next prime is 138361621. The reversal of 138361619 is 916163831.

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 138361619 - 2¹⁶ = 138296083 is a prime.

It is a super-2 number, since 2×138361619² = 38287875224602322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138361669) 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, 3854 + ... + 17075.

It is an arithmetic number, because the mean of its divisors is an integer number (18899790).

Almost surely, 2^138361619 is an apocalyptic number.

138361619 is a deficient number, since it is larger than the sum of its proper divisors (12836701).

138361619 is a wasteful number, since it uses less digits than its factorization.

138361619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21541.

The product of its digits is 23328, while the sum is 38.

The square root of 138361619 is about 11762.7215813348. The cubic root of 138361619 is about 517.2159132183.

The spelling of 138361619 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, six hundred nineteen".