2247691 has 2 divisors, whose sum is σ = 2247692. Its totient is φ = 2247690.

The previous prime is 2247673. The next prime is 2247697. The reversal of 2247691 is 1967422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2247691 - 2⁵ = 2247659 is a prime.

It is a super-2 number, since 2×2247691² = 10104229662962, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁵ + 2²¹ + 4 + 7⁶ + 6² + 9² + 1 .

It is equal to p₁₆₅₉₁₉ and since 2247691 and 165919 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2247697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1123845 + 1123846.

It is an arithmetic number, because the mean of its divisors is an integer number (1123846).

2^2247691 is an apocalyptic number.

2247691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2247691 is an equidigital number, since it uses as much as digits as its factorization.

2247691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 2247691 is about 1499.2301357697. The cubic root of 2247691 is about 130.9922299841.

The spelling of 2247691 in words is "two million, two hundred forty-seven thousand, six hundred ninety-one".