1268631733 has 4 divisors (see below), whose sum is σ = 1277758720. Its totient is φ = 1259504748.

The previous prime is 1268631731. The next prime is 1268631737. The reversal of 1268631733 is 3371368621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3371368621 = 13421 ⋅251201.

It is a cyclic number.

It is not a de Polignac number, because 1268631733 - 2¹ = 1268631731 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 (1268631731) 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 3 ways as a sum of consecutive naturals, for example, 4563285 + ... + 4563562.

It is an arithmetic number, because the mean of its divisors is an integer number (319439680).

Almost surely, 2^1268631733 is an apocalyptic number.

It is an amenable number.

1268631733 is a deficient number, since it is larger than the sum of its proper divisors (9126987).

1268631733 is an equidigital number, since it uses as much as digits as its factorization.

1268631733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126986.

The product of its digits is 108864, while the sum is 40.

The square root of 1268631733 is about 35617.8569400238. The cubic root of 1268631733 is about 1082.5430848662.

The spelling of 1268631733 in words is "one billion, two hundred sixty-eight million, six hundred thirty-one thousand, seven hundred thirty-three".