2136643 has 2 divisors, whose sum is σ = 2136644. Its totient is φ = 2136642.

The previous prime is 2136601. The next prime is 2136649. The reversal of 2136643 is 3466312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2136643 - 2⁹ = 2136131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2136649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068321 + 1068322.

It is an arithmetic number, because the mean of its divisors is an integer number (1068322).

2^2136643 is an apocalyptic number.

2136643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136643 is an equidigital number, since it uses as much as digits as its factorization.

2136643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 2136643 is about 1461.7260345222. The cubic root of 2136643 is about 128.7984553844.

The spelling of 2136643 in words is "two million, one hundred thirty-six thousand, six hundred forty-three".