8911926409 has 9 divisors (see below), whose sum is σ = 9053350887. Its totient is φ = 8772681984.

The previous prime is 8911926391. The next prime is 8911926431. The reversal of 8911926409 is 9046291198.

It is a happy number.

The square root of 8911926409 is 94403.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 113486409 + 8798440000 = 10653^2 + 93800^2 .

It is not a de Polignac number, because 8911926409 - 2⁷ = 8911926281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8911924409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6324297 + ... + 6325705.

Almost surely, 2^8911926409 is an apocalyptic number.

8911926409 is the 94403-rd square number.

8911926409 is the 47202-nd centered octagonal number.

It is an amenable number.

8911926409 is a deficient number, since it is larger than the sum of its proper divisors (141424478).

8911926409 is an frugal number, since it uses more digits than its factorization.

8911926409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The cubic root of 8911926409 is about 2073.2763667835.

Multiplying 8911926409 by its sum of digits (49), we get a square (436684394041 = 660821²).

The spelling of 8911926409 in words is "eight billion, nine hundred eleven million, nine hundred twenty-six thousand, four hundred nine".