138697387669 has 8 divisors (see below), whose sum is σ = 144752509440. Its totient is φ = 132644332656.

The previous prime is 138697387651. The next prime is 138697387681. The reversal of 138697387669 is 966783796831.

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 138697387669 - 2⁷ = 138697387541 is a prime.

It is a super-2 number, since 2×138697387669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138697387069) 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, 378757 + ... + 648730.

It is an arithmetic number, because the mean of its divisors is an integer number (18094063680).

Almost surely, 2^138697387669 is an apocalyptic number.

It is an amenable number.

138697387669 is a deficient number, since it is larger than the sum of its proper divisors (6055121771).

138697387669 is a wasteful number, since it uses less digits than its factorization.

138697387669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033379.

The product of its digits is 493807104, while the sum is 73.

The spelling of 138697387669 in words is "one hundred thirty-eight billion, six hundred ninety-seven million, three hundred eighty-seven thousand, six hundred sixty-nine".