1264692563 has 2 divisors, whose sum is σ = 1264692564. Its totient is φ = 1264692562.

The previous prime is 1264692521. The next prime is 1264692623. The reversal of 1264692563 is 3652964621.

It is a weak prime.

It is an emirp because it is prime and its reverse (3652964621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264692563 - 2¹⁰ = 1264691539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264691563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632346281 + 632346282.

It is an arithmetic number, because the mean of its divisors is an integer number (632346282).

Almost surely, 2^1264692563 is an apocalyptic number.

1264692563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264692563 is an equidigital number, since it uses as much as digits as its factorization.

1264692563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 44.

The square root of 1264692563 is about 35562.5162636167. The cubic root of 1264692563 is about 1081.4214716060.

The spelling of 1264692563 in words is "one billion, two hundred sixty-four million, six hundred ninety-two thousand, five hundred sixty-three".