1263461489 has 4 divisors (see below), whose sum is σ = 1272551280. Its totient is φ = 1254371700.

The previous prime is 1263461477. The next prime is 1263461509. The reversal of 1263461489 is 9841643621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1263461489 - 2²⁰ = 1262412913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263461189) 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, 4544687 + ... + 4544964.

It is an arithmetic number, because the mean of its divisors is an integer number (318137820).

Almost surely, 2^1263461489 is an apocalyptic number.

It is an amenable number.

1263461489 is a deficient number, since it is larger than the sum of its proper divisors (9089791).

1263461489 is an equidigital number, since it uses as much as digits as its factorization.

1263461489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089790.

The product of its digits is 248832, while the sum is 44.

The square root of 1263461489 is about 35545.2034598200. The cubic root of 1263461489 is about 1081.0704661250.

The spelling of 1263461489 in words is "one billion, two hundred sixty-three million, four hundred sixty-one thousand, four hundred eighty-nine".