1263790163 has 2 divisors, whose sum is σ = 1263790164. Its totient is φ = 1263790162.

The previous prime is 1263790117. The next prime is 1263790169. The reversal of 1263790163 is 3610973621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263790163 - 2¹² = 1263786067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263790169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631895081 + 631895082.

It is an arithmetic number, because the mean of its divisors is an integer number (631895082).

Almost surely, 2^1263790163 is an apocalyptic number.

1263790163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263790163 is an equidigital number, since it uses as much as digits as its factorization.

1263790163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 1263790163 is about 35549.8264834021. The cubic root of 1263790163 is about 1081.1642004022.

The spelling of 1263790163 in words is "one billion, two hundred sixty-three million, seven hundred ninety thousand, one hundred sixty-three".