1244773899 has 20 divisors (see below), whose sum is σ = 1904835240. Its totient is φ = 809606880.

The previous prime is 1244773891. The next prime is 1244773903. The reversal of 1244773899 is 9983774421.

It is not a de Polignac number, because 1244773899 - 2³ = 1244773891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244773891) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 184089 + ... + 190730.

It is an arithmetic number, because the mean of its divisors is an integer number (95241762).

Almost surely, 2^1244773899 is an apocalyptic number.

1244773899 is a deficient number, since it is larger than the sum of its proper divisors (660061341).

1244773899 is an equidigital number, since it uses as much as digits as its factorization.

1244773899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374872 (or 374863 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1244773899 is about 35281.3534179175. The cubic root of 1244773899 is about 1075.7140088705.

The spelling of 1244773899 in words is "one billion, two hundred forty-four million, seven hundred seventy-three thousand, eight hundred ninety-nine".