1243968355 has 8 divisors (see below), whose sum is σ = 1706013792. Its totient is φ = 853006848.

The previous prime is 1243968347. The next prime is 1243968391. The reversal of 1243968355 is 5538693421.

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 1243968355 - 2³ = 1243968347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17770942 + ... + 17771011.

It is an arithmetic number, because the mean of its divisors is an integer number (213251724).

Almost surely, 2^1243968355 is an apocalyptic number.

1243968355 is a deficient number, since it is larger than the sum of its proper divisors (462045437).

1243968355 is an equidigital number, since it uses as much as digits as its factorization.

1243968355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35541965.

The product of its digits is 777600, while the sum is 46.

The square root of 1243968355 is about 35269.9355684129. The cubic root of 1243968355 is about 1075.4819126489.

The spelling of 1243968355 in words is "one billion, two hundred forty-three million, nine hundred sixty-eight thousand, three hundred fifty-five".