1249910923 has 4 divisors (see below), whose sum is σ = 1270401328. Its totient is φ = 1229420520.

The previous prime is 1249910911. The next prime is 1249910969. The reversal of 1249910923 is 3290199421.

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 1249910923 - 2¹⁷ = 1249779851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249910983) 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, 10245111 + ... + 10245232.

It is an arithmetic number, because the mean of its divisors is an integer number (317600332).

Almost surely, 2^1249910923 is an apocalyptic number.

1249910923 is a deficient number, since it is larger than the sum of its proper divisors (20490405).

1249910923 is an equidigital number, since it uses as much as digits as its factorization.

1249910923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20490404.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 1249910923 is about 35354.0792978689. The cubic root of 1249910923 is about 1077.1917563309.

The spelling of 1249910923 in words is "one billion, two hundred forty-nine million, nine hundred ten thousand, nine hundred twenty-three".