1247881323 has 8 divisors (see below), whose sum is σ = 1791829648. Its totient is φ = 767926944.

The previous prime is 1247881309. The next prime is 1247881333. The reversal of 1247881323 is 3231887421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1247881323 - 2⁵ = 1247881291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 31996957 = 1247881323 / (1 + 2 + 4 + 7 + 8 + 8 + 1 + 3 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247881333) 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 7 ways as a sum of consecutive naturals, for example, 15998440 + ... + 15998517.

It is an arithmetic number, because the mean of its divisors is an integer number (223978706).

Almost surely, 2^1247881323 is an apocalyptic number.

1247881323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1247881323 is a deficient number, since it is larger than the sum of its proper divisors (543948325).

1247881323 is a wasteful number, since it uses less digits than its factorization.

1247881323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31996973.

The product of its digits is 64512, while the sum is 39.

The square root of 1247881323 is about 35325.3637348577. The cubic root of 1247881323 is about 1076.6083940107.

The spelling of 1247881323 in words is "one billion, two hundred forty-seven million, eight hundred eighty-one thousand, three hundred twenty-three".