8891965 has 4 divisors (see below), whose sum is σ = 10670364. Its totient is φ = 7113568.

The previous prime is 8891929. The next prime is 8891983. The reversal of 8891965 is 5691988.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4507129 + 4384836 = 2123^2 + 2094^2 .

It is a cyclic number.

It is not a de Polignac number, because 8891965 - 2⁷ = 8891837 is a prime.

It is a super-2 number, since 2×8891965² = 158134083122450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889192 + ... + 889201.

It is an arithmetic number, because the mean of its divisors is an integer number (2667591).

Almost surely, 2^8891965 is an apocalyptic number.

It is an amenable number.

8891965 is a deficient number, since it is larger than the sum of its proper divisors (1778399).

8891965 is a wasteful number, since it uses less digits than its factorization.

8891965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778398.

The product of its digits is 155520, while the sum is 46.

The square root of 8891965 is about 2981.9398048921. The cubic root of 8891965 is about 207.1727264554.

The spelling of 8891965 in words is "eight million, eight hundred ninety-one thousand, nine hundred sixty-five".