1264299823 has 4 divisors (see below), whose sum is σ = 1268965408. Its totient is φ = 1259634240.

The previous prime is 1264299797. The next prime is 1264299851. The reversal of 1264299823 is 3289924621.

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 1264299823 - 2⁵ = 1264299791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264299853) 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, 2332386 + ... + 2332927.

It is an arithmetic number, because the mean of its divisors is an integer number (317241352).

Almost surely, 2^1264299823 is an apocalyptic number.

1264299823 is a deficient number, since it is larger than the sum of its proper divisors (4665585).

1264299823 is an equidigital number, since it uses as much as digits as its factorization.

1264299823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665584.

The product of its digits is 373248, while the sum is 46.

The square root of 1264299823 is about 35556.9940096179. The cubic root of 1264299823 is about 1081.3095177992.

The spelling of 1264299823 in words is "one billion, two hundred sixty-four million, two hundred ninety-nine thousand, eight hundred twenty-three".