138017619 has 6 divisors (see below), whose sum is σ = 199358796. Its totient is φ = 92011740.

The previous prime is 138017617. The next prime is 138017639. The reversal of 138017619 is 916710831.

138017619 is a `hidden beast` number, since 1 + 38 + 0 + 1 + 7 + 619 = 666.

It is not a de Polignac number, because 138017619 - 2¹ = 138017617 is a prime.

It is a super-2 number, since 2×138017619² = 38097726308858322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138017617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7667637 + ... + 7667654.

It is an arithmetic number, because the mean of its divisors is an integer number (33226466).

Almost surely, 2^138017619 is an apocalyptic number.

138017619 is a deficient number, since it is larger than the sum of its proper divisors (61341177).

138017619 is a wasteful number, since it uses less digits than its factorization.

138017619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15335297 (or 15335294 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 138017619 is about 11748.0900149769. The cubic root of 138017619 is about 516.7869167672.

The spelling of 138017619 in words is "one hundred thirty-eight million, seventeen thousand, six hundred nineteen".