8991669 has 12 divisors (see below), whose sum is σ = 12295328. Its totient is φ = 5844960.

The previous prime is 8991667. The next prime is 8991679. The reversal of 8991669 is 9661998.

8991669 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8991669 - 2¹ = 8991667 is a prime.

It is a super-2 number, since 2×8991669² = 161700222811122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4152 + ... + 5934.

Almost surely, 2^8991669 is an apocalyptic number.

It is an amenable number.

8991669 is a deficient number, since it is larger than the sum of its proper divisors (3303659).

8991669 is a wasteful number, since it uses less digits than its factorization.

8991669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1827 counting only the distinct ones).

The product of its digits is 209952, while the sum is 48.

The square root of 8991669 is about 2998.6111785292. The cubic root of 8991669 is about 207.9441803493.

The spelling of 8991669 in words is "eight million, nine hundred ninety-one thousand, six hundred sixty-nine".