1268369887 has 4 divisors (see below), whose sum is σ = 1270206136. Its totient is φ = 1266533640.

The previous prime is 1268369863. The next prime is 1268369911. The reversal of 1268369887 is 7889638621.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1268369863) and next prime (1268369911).

It is a cyclic number.

It is not a de Polignac number, because 1268369887 - 2⁷ = 1268369759 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 (1268369827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917088 + ... + 918469.

It is an arithmetic number, because the mean of its divisors is an integer number (317551534).

Almost surely, 2^1268369887 is an apocalyptic number.

1268369887 is a deficient number, since it is larger than the sum of its proper divisors (1836249).

1268369887 is an equidigital number, since it uses as much as digits as its factorization.

1268369887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836248.

The product of its digits is 6967296, while the sum is 58.

The square root of 1268369887 is about 35614.1809817382. The cubic root of 1268369887 is about 1082.4686006605.

The spelling of 1268369887 in words is "one billion, two hundred sixty-eight million, three hundred sixty-nine thousand, eight hundred eighty-seven".