2291966 has 4 divisors (see below), whose sum is σ = 3437952. Its totient is φ = 1145982.

The previous prime is 2291963. The next prime is 2291983. The reversal of 2291966 is 6691922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6691922 = 2 ⋅3345961.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572990 + ... + 572993.

It is an arithmetic number, because the mean of its divisors is an integer number (859488).

2^2291966 is an apocalyptic number.

2291966 is a deficient number, since it is larger than the sum of its proper divisors (1145986).

2291966 is a wasteful number, since it uses less digits than its factorization.

2291966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145985.

The product of its digits is 11664, while the sum is 35.

The square root of 2291966 is about 1513.9240403666. The cubic root of 2291966 is about 131.8467382517.

The spelling of 2291966 in words is "two million, two hundred ninety-one thousand, nine hundred sixty-six".