8917969 has 4 divisors (see below), whose sum is σ = 8924580. Its totient is φ = 8911360.

The previous prime is 8917963. The next prime is 8917991. The reversal of 8917969 is 9697198.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4558225 + 4359744 = 2135^2 + 2088^2 .

It is a cyclic number.

It is not a de Polignac number, because 8917969 - 2⁷ = 8917841 is a prime.

It is a super-2 number, since 2×8917969² = 159060342169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8917963) 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, 472 + ... + 4249.

It is an arithmetic number, because the mean of its divisors is an integer number (2231145).

Almost surely, 2^8917969 is an apocalyptic number.

8917969 is the 1889-th heptagonal number.

It is an amenable number.

8917969 is a deficient number, since it is larger than the sum of its proper divisors (6611).

8917969 is a wasteful number, since it uses less digits than its factorization.

8917969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610.

The product of its digits is 244944, while the sum is 49.

The square root of 8917969 is about 2986.2968707079. The cubic root of 8917969 is about 207.3744845021.

Subtracting from 8917969 its product of digits (244944), we obtain a square (8673025 = 2945²).

The spelling of 8917969 in words is "eight million, nine hundred seventeen thousand, nine hundred sixty-nine".