8911920069 has 24 divisors (see below), whose sum is σ = 13886472600. Its totient is φ = 5474967552.

The previous prime is 8911920067. The next prime is 8911920089. The reversal of 8911920069 is 9600291198.

It can be written as a sum of positive squares in 4 ways, for example, as 597215844 + 8314704225 = 24438^2 + 91185^2 .

It is not a de Polignac number, because 8911920069 - 2¹ = 8911920067 is a prime.

It is a super-2 number, since 2×8911920069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8911920067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5157 + ... + 133605.

It is an arithmetic number, because the mean of its divisors is an integer number (578603025).

Almost surely, 2^8911920069 is an apocalyptic number.

It is an amenable number.

8911920069 is a deficient number, since it is larger than the sum of its proper divisors (4974552531).

8911920069 is a wasteful number, since it uses less digits than its factorization.

8911920069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129061 (or 129058 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 8911920069 is about 94402.9664205527. The cubic root of 8911920069 is about 2073.2758751362.

The spelling of 8911920069 in words is "eight billion, nine hundred eleven million, nine hundred twenty thousand, sixty-nine".