1262990863 has 2 divisors, whose sum is σ = 1262990864. Its totient is φ = 1262990862.

The previous prime is 1262990761. The next prime is 1262990867. The reversal of 1262990863 is 3680992621.

It is a strong prime.

It is an emirp because it is prime and its reverse (3680992621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1262990863 - 2¹⁷ = 1262859791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1262990867) 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, 631495431 + 631495432.

It is an arithmetic number, because the mean of its divisors is an integer number (631495432).

Almost surely, 2^1262990863 is an apocalyptic number.

1262990863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1262990863 is an equidigital number, since it uses as much as digits as its factorization.

1262990863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1262990863 is about 35538.5827376388. The cubic root of 1262990863 is about 1080.9362203623.

The spelling of 1262990863 in words is "one billion, two hundred sixty-two million, nine hundred ninety thousand, eight hundred sixty-three".