1243878359 has 8 divisors (see below), whose sum is σ = 1294315200. Its totient is φ = 1194440416.

The previous prime is 1243878319. The next prime is 1243878371. The reversal of 1243878359 is 9538783421.

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 1243878359 - 2²⁴ = 1227101143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243878319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247184 + ... + 252165.

It is an arithmetic number, because the mean of its divisors is an integer number (161789400).

Almost surely, 2^1243878359 is an apocalyptic number.

1243878359 is a deficient number, since it is larger than the sum of its proper divisors (50436841).

1243878359 is an equidigital number, since it uses as much as digits as its factorization.

1243878359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499449.

The product of its digits is 1451520, while the sum is 50.

The square root of 1243878359 is about 35268.6597278660. The cubic root of 1243878359 is about 1075.4559764574.

The spelling of 1243878359 in words is "one billion, two hundred forty-three million, eight hundred seventy-eight thousand, three hundred fifty-nine".