2163426491 has 2 divisors, whose sum is σ = 2163426492. Its totient is φ = 2163426490.

The previous prime is 2163426389. The next prime is 2163426527. The reversal of 2163426491 is 1946243612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2163426491 - 2¹⁸ = 2163164347 is a prime.

It is not a weakly prime, because it can be changed into another prime (2163426091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081713245 + 1081713246.

It is an arithmetic number, because the mean of its divisors is an integer number (1081713246).

Almost surely, 2^2163426491 is an apocalyptic number.

2163426491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163426491 is an equidigital number, since it uses as much as digits as its factorization.

2163426491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 2163426491 is about 46512.6487205362. The cubic root of 2163426491 is about 1293.3439854064.

The spelling of 2163426491 in words is "two billion, one hundred sixty-three million, four hundred twenty-six thousand, four hundred ninety-one".