2868991 has 4 divisors (see below), whose sum is σ = 2895912. Its totient is φ = 2842072.

The previous prime is 2868977. The next prime is 2869001. The reversal of 2868991 is 1998682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2868991 - 2⁵ = 2868959 is a prime.

It is a super-2 number, since 2×2868991² = 16462218716162, 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 (2868961) 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, 13300 + ... + 13513.

It is an arithmetic number, because the mean of its divisors is an integer number (723978).

2^2868991 is an apocalyptic number.

2868991 is a deficient number, since it is larger than the sum of its proper divisors (26921).

2868991 is a wasteful number, since it uses less digits than its factorization.

2868991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26920.

The product of its digits is 62208, while the sum is 43.

The square root of 2868991 is about 1693.8096114971. The cubic root of 2868991 is about 142.0942144058.

The spelling of 2868991 in words is "two million, eight hundred sixty-eight thousand, nine hundred ninety-one".