263491461979 has 2 divisors, whose sum is σ = 263491461980. Its totient is φ = 263491461978.

The previous prime is 263491461923. The next prime is 263491462001. The reversal of 263491461979 is 979164194362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263491461979 - 2¹⁵ = 263491429211 is a prime.

It is not a weakly prime, because it can be changed into another prime (263491468979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131745730989 + 131745730990.

It is an arithmetic number, because the mean of its divisors is an integer number (131745730990).

Almost surely, 2^263491461979 is an apocalyptic number.

263491461979 is a deficient number, since it is larger than the sum of its proper divisors (1).

263491461979 is an equidigital number, since it uses as much as digits as its factorization.

263491461979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 61.

The spelling of 263491461979 in words is "two hundred sixty-three billion, four hundred ninety-one million, four hundred sixty-one thousand, nine hundred seventy-nine".