9138918669 has 4 divisors (see below), whose sum is σ = 12185224896. Its totient is φ = 6092612444.

The previous prime is 9138918653. The next prime is 9138918689. The reversal of 9138918669 is 9668198319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9138918669 - 2⁴ = 9138918653 is a prime.

It is a super-2 number, since 2×9138918669² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138918689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523153109 + ... + 1523153114.

It is an arithmetic number, because the mean of its divisors is an integer number (3046306224).

Almost surely, 2^9138918669 is an apocalyptic number.

It is an amenable number.

9138918669 is a deficient number, since it is larger than the sum of its proper divisors (3046306227).

9138918669 is a wasteful number, since it uses less digits than its factorization.

9138918669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046306226.

The product of its digits is 5038848, while the sum is 60.

The square root of 9138918669 is about 95597.6917556067. The cubic root of 9138918669 is about 2090.7315395113.

The spelling of 9138918669 in words is "nine billion, one hundred thirty-eight million, nine hundred eighteen thousand, six hundred sixty-nine".