8630781491 has 2 divisors, whose sum is σ = 8630781492. Its totient is φ = 8630781490.

The previous prime is 8630781479. The next prime is 8630781563. The reversal of 8630781491 is 1941870368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8630781491 - 2²² = 8626587187 is a prime.

It is not a weakly prime, because it can be changed into another prime (8630781451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4315390745 + 4315390746.

It is an arithmetic number, because the mean of its divisors is an integer number (4315390746).

Almost surely, 2^8630781491 is an apocalyptic number.

8630781491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8630781491 is an equidigital number, since it uses as much as digits as its factorization.

8630781491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 8630781491 is about 92901.9993918323. Note that the first 3 decimals coincide. The cubic root of 8630781491 is about 2051.2410879435.

The spelling of 8630781491 in words is "eight billion, six hundred thirty million, seven hundred eighty-one thousand, four hundred ninety-one".