2813989 has 2 divisors, whose sum is σ = 2813990. Its totient is φ = 2813988.

The previous prime is 2813983. The next prime is 2814001. The reversal of 2813989 is 9893182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2748964 + 65025 = 1658^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2813989 - 2⁹ = 2813477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2813983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406994 + 1406995.

It is an arithmetic number, because the mean of its divisors is an integer number (1406995).

2^2813989 is an apocalyptic number.

It is an amenable number.

2813989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2813989 is an equidigital number, since it uses as much as digits as its factorization.

2813989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The square root of 2813989 is about 1677.4948584124. The cubic root of 2813989 is about 141.1803102067.

The spelling of 2813989 in words is "two million, eight hundred thirteen thousand, nine hundred eighty-nine".