1263640327 has 4 divisors (see below), whose sum is σ = 1263861576. Its totient is φ = 1263419080.

The previous prime is 1263640307. The next prime is 1263640337. The reversal of 1263640327 is 7230463621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7230463621 = 72937 ⋅99133.

It is a cyclic number.

It is not a de Polignac number, because 1263640327 - 2⁷ = 1263640199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263640292 and 1263640301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263640307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101824 + ... + 113557.

It is an arithmetic number, because the mean of its divisors is an integer number (315965394).

Almost surely, 2^1263640327 is an apocalyptic number.

1263640327 is a deficient number, since it is larger than the sum of its proper divisors (221249).

1263640327 is an equidigital number, since it uses as much as digits as its factorization.

1263640327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221248.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 1263640327 is about 35547.7190126174. The cubic root of 1263640327 is about 1081.1214708082.

The spelling of 1263640327 in words is "one billion, two hundred sixty-three million, six hundred forty thousand, three hundred twenty-seven".