2269991 has 2 divisors, whose sum is σ = 2269992. Its totient is φ = 2269990.

The previous prime is 2269973. The next prime is 2270003. The reversal of 2269991 is 1999622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2269991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2269901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1134995 + 1134996.

It is an arithmetic number, because the mean of its divisors is an integer number (1134996).

2^2269991 is an apocalyptic number.

2269991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2269991 is an equidigital number, since it uses as much as digits as its factorization.

2269991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 38.

The square root of 2269991 is about 1506.6489305741. The cubic root of 2269991 is about 131.4240092597.

The spelling of 2269991 in words is "two million, two hundred sixty-nine thousand, nine hundred ninety-one".