2164747943 has 2 divisors, whose sum is σ = 2164747944. Its totient is φ = 2164747942.

The previous prime is 2164747903. The next prime is 2164747993. The reversal of 2164747943 is 3497474612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164747943 is a prime.

It is a super-2 number, since 2×2164747943² = 9372267313445462498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2164747903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082373971 + 1082373972.

It is an arithmetic number, because the mean of its divisors is an integer number (1082373972).

Almost surely, 2^2164747943 is an apocalyptic number.

2164747943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164747943 is an equidigital number, since it uses as much as digits as its factorization.

2164747943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 47.

The square root of 2164747943 is about 46526.8518492279. The cubic root of 2164747943 is about 1293.6072628418.

The spelling of 2164747943 in words is "two billion, one hundred sixty-four million, seven hundred forty-seven thousand, nine hundred forty-three".