1478147789 has 8 divisors (see below), whose sum is σ = 1498512120. Its totient is φ = 1457888256.

The previous prime is 1478147779. The next prime is 1478147809. The reversal of 1478147789 is 9877418741.

It can be written as a sum of positive squares in 4 ways, for example, as 1064716900 + 413430889 = 32630^2 + 20333^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1478147789 - 2⁸ = 1478147533 is a prime.

It is a super-2 number, since 2×1478147789² = 4369841772251177042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478147779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2417 + ... + 54425.

It is an arithmetic number, because the mean of its divisors is an integer number (187314015).

Almost surely, 2^1478147789 is an apocalyptic number.

It is an amenable number.

1478147789 is a deficient number, since it is larger than the sum of its proper divisors (20364331).

1478147789 is an equidigital number, since it uses as much as digits as its factorization.

1478147789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52399.

The product of its digits is 3161088, while the sum is 56.

The square root of 1478147789 is about 38446.6876206521. The cubic root of 1478147789 is about 1139.1282421754.

The spelling of 1478147789 in words is "one billion, four hundred seventy-eight million, one hundred forty-seven thousand, seven hundred eighty-nine".