1263540319 has 2 divisors, whose sum is σ = 1263540320. Its totient is φ = 1263540318.

The previous prime is 1263540301. The next prime is 1263540361. The reversal of 1263540319 is 9130453621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263540319 - 2¹⁹ = 1263016031 is a prime.

It is a super-2 number, since 2×1263540319² = 3193068275477243522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263540119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631770159 + 631770160.

It is an arithmetic number, because the mean of its divisors is an integer number (631770160).

Almost surely, 2^1263540319 is an apocalyptic number.

1263540319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263540319 is an equidigital number, since it uses as much as digits as its factorization.

1263540319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1263540319 is about 35546.3123122498. The cubic root of 1263540319 is about 1081.0929490719.

The spelling of 1263540319 in words is "one billion, two hundred sixty-three million, five hundred forty thousand, three hundred nineteen".