2869981 has 2 divisors, whose sum is σ = 2869982. Its totient is φ = 2869980.

The previous prime is 2869973. The next prime is 2869987. The reversal of 2869981 is 1899682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2277081 + 592900 = 1509^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2869981 - 2³ = 2869973 is a prime.

It is a super-2 number, since 2×2869981² = 16473581880722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2869987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1434990 + 1434991.

It is an arithmetic number, because the mean of its divisors is an integer number (1434991).

2^2869981 is an apocalyptic number.

It is an amenable number.

2869981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2869981 is an equidigital number, since it uses as much as digits as its factorization.

2869981 is an evil number, because the sum of its binary digits is even.

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

The square root of 2869981 is about 1694.1018269278. The cubic root of 2869981 is about 142.1105566314.

Subtracting from 2869981 its reverse (1899682), we obtain a cube (970299 = 99³).

The spelling of 2869981 in words is "two million, eight hundred sixty-nine thousand, nine hundred eighty-one".