1263361679 has 2 divisors, whose sum is σ = 1263361680. Its totient is φ = 1263361678.

The previous prime is 1263361609. The next prime is 1263361691. The reversal of 1263361679 is 9761633621.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9761633621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263361679 - 2²⁰ = 1262313103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263361609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631680839 + 631680840.

It is an arithmetic number, because the mean of its divisors is an integer number (631680840).

Almost surely, 2^1263361679 is an apocalyptic number.

1263361679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263361679 is an equidigital number, since it uses as much as digits as its factorization.

1263361679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 1263361679 is about 35543.7994451916. The cubic root of 1263361679 is about 1081.0419981726.

The spelling of 1263361679 in words is "one billion, two hundred sixty-three million, three hundred sixty-one thousand, six hundred seventy-nine".