2293981 has 2 divisors, whose sum is σ = 2293982. Its totient is φ = 2293980.

The previous prime is 2293961. The next prime is 2294009. The reversal of 2293981 is 1893922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2277081 + 16900 = 1509^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2293981 - 2¹⁵ = 2261213 is a prime.

It is a super-2 number, since 2×2293981² = 10524697656722, which contains 22 as substring.

2293981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2293901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1146990 + 1146991.

It is an arithmetic number, because the mean of its divisors is an integer number (1146991).

2^2293981 is an apocalyptic number.

It is an amenable number.

2293981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2293981 is an equidigital number, since it uses as much as digits as its factorization.

2293981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 2293981 is about 1514.5893832983. The cubic root of 2293981 is about 131.8853649678.

The spelling of 2293981 in words is "two million, two hundred ninety-three thousand, nine hundred eighty-one".