2891965 has 8 divisors (see below), whose sum is σ = 3551328. Its totient is φ = 2259600.

The previous prime is 2891963. The next prime is 2891981. The reversal of 2891965 is 5691982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2891965 - 2¹ = 2891963 is a prime.

It is a super-2 number, since 2×2891965² = 16726923122450, 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 (2891963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6511 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (443916).

2^2891965 is an apocalyptic number.

It is an amenable number.

2891965 is a deficient number, since it is larger than the sum of its proper divisors (659363).

2891965 is a wasteful number, since it uses less digits than its factorization.

2891965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13499.

The product of its digits is 38880, while the sum is 40.

The square root of 2891965 is about 1700.5778429699. The cubic root of 2891965 is about 142.4724887897.

The spelling of 2891965 in words is "two million, eight hundred ninety-one thousand, nine hundred sixty-five".