1299238923 has 32 divisors (see below), whose sum is σ = 1916393472. Its totient is φ = 779328000.

The previous prime is 1299238921. The next prime is 1299238949. The reversal of 1299238923 is 3298329921.

It is a happy number.

It is not a de Polignac number, because 1299238923 - 2¹ = 1299238921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299238921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126273 + ... + 136173.

It is an arithmetic number, because the mean of its divisors is an integer number (59887296).

Almost surely, 2^1299238923 is an apocalyptic number.

1299238923 is a deficient number, since it is larger than the sum of its proper divisors (617154549).

1299238923 is a wasteful number, since it uses less digits than its factorization.

1299238923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10035.

The product of its digits is 419904, while the sum is 48.

The square root of 1299238923 is about 36044.9569704279. The cubic root of 1299238923 is about 1091.1798584020.

It can be divided in two parts, 12992 and 38923, that added together give a palindrome (51915).

The spelling of 1299238923 in words is "one billion, two hundred ninety-nine million, two hundred thirty-eight thousand, nine hundred twenty-three".