1263134623 has 4 divisors (see below), whose sum is σ = 1263298248. Its totient is φ = 1262971000.

The previous prime is 1263134617. The next prime is 1263134633. The reversal of 1263134623 is 3264313621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1263134623 - 2⁵ = 1263134591 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263134603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69628 + ... + 85873.

It is an arithmetic number, because the mean of its divisors is an integer number (315824562).

Almost surely, 2^1263134623 is an apocalyptic number.

1263134623 is a deficient number, since it is larger than the sum of its proper divisors (163625).

1263134623 is an equidigital number, since it uses as much as digits as its factorization.

1263134623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163624.

The product of its digits is 15552, while the sum is 31.

The square root of 1263134623 is about 35540.6052705916. The cubic root of 1263134623 is about 1080.9772313466.

The spelling of 1263134623 in words is "one billion, two hundred sixty-three million, one hundred thirty-four thousand, six hundred twenty-three".