1263330491 has 2 divisors, whose sum is σ = 1263330492. Its totient is φ = 1263330490.

The previous prime is 1263330433. The next prime is 1263330511. The reversal of 1263330491 is 1940333621.

1263330491 is nontrivially palindromic in base 11.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263330491 - 2²² = 1259136187 is a prime.

It is a super-3 number, since 3×1263330491³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1263330421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631665245 + 631665246.

It is an arithmetic number, because the mean of its divisors is an integer number (631665246).

Almost surely, 2^1263330491 is an apocalyptic number.

1263330491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263330491 is an equidigital number, since it uses as much as digits as its factorization.

1263330491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 1263330491 is about 35543.3607161731. The cubic root of 1263330491 is about 1081.0331023787.

The spelling of 1263330491 in words is "one billion, two hundred sixty-three million, three hundred thirty thousand, four hundred ninety-one".