1299475823 has 4 divisors (see below), whose sum is σ = 1301107080. Its totient is φ = 1297844568.

The previous prime is 1299475817. The next prime is 1299475841. The reversal of 1299475823 is 3285749921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3285749921 = 433 ⋅7588337.

It is a cyclic number.

It is not a de Polignac number, because 1299475823 - 2²⁶ = 1232366959 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 (1299478823) 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, 814433 + ... + 816026.

It is an arithmetic number, because the mean of its divisors is an integer number (325276770).

Almost surely, 2^1299475823 is an apocalyptic number.

1299475823 is a deficient number, since it is larger than the sum of its proper divisors (1631257).

1299475823 is an equidigital number, since it uses as much as digits as its factorization.

1299475823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631256.

The product of its digits is 1088640, while the sum is 50.

The square root of 1299475823 is about 36048.2429946315. The cubic root of 1299475823 is about 1091.2461753803.

The spelling of 1299475823 in words is "one billion, two hundred ninety-nine million, four hundred seventy-five thousand, eight hundred twenty-three".