138847899469 has 32 divisors (see below), whose sum is σ = 147956170752. Its totient is φ = 130097016000.

The previous prime is 138847899451. The next prime is 138847899499. The reversal of 138847899469 is 964998748831.

It is a cyclic number.

It is not a de Polignac number, because 138847899469 - 2⁷ = 138847899341 is a prime.

It is a super-2 number, since 2×138847899469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138847899395 and 138847899404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138847899499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79750939 + ... + 79752679.

It is an arithmetic number, because the mean of its divisors is an integer number (4623630336).

Almost surely, 2^138847899469 is an apocalyptic number.

It is an amenable number.

138847899469 is a deficient number, since it is larger than the sum of its proper divisors (9108271283).

138847899469 is a wasteful number, since it uses less digits than its factorization.

138847899469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377.

The product of its digits is 752467968, while the sum is 76.

The spelling of 138847899469 in words is "one hundred thirty-eight billion, eight hundred forty-seven million, eight hundred ninety-nine thousand, four hundred sixty-nine".