1238897388969 has 6 divisors (see below), whose sum is σ = 1789518450746. Its totient is φ = 825931592640.

The previous prime is 1238897388959. The next prime is 1238897388991. The reversal of 1238897388969 is 9698837988321.

1238897388969 is a `hidden beast` number, since 1 + 2 + 388 + 9 + 73 + 88 + 96 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1192365722025 + 46531666944 = 1091955^2 + 215712^2 .

It is not a de Polignac number, because 1238897388969 - 2²³ = 1238889000361 is a prime.

It is a super-2 number, since 2×1238897388969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1238897388959) 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, 68827632712 + ... + 68827632729.

Almost surely, 2^{1238897388969} is an apocalyptic number.

It is an amenable number.

1238897388969 is a deficient number, since it is larger than the sum of its proper divisors (550621061777).

1238897388969 is a wasteful number, since it uses less digits than its factorization.

1238897388969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137655265447 (or 137655265444 counting only the distinct ones).

The product of its digits is 2257403904, while the sum is 81.

The spelling of 1238897388969 in words is "one trillion, two hundred thirty-eight billion, eight hundred ninety-seven million, three hundred eighty-eight thousand, nine hundred sixty-nine".