1368453805 has 4 divisors (see below), whose sum is σ = 1642144572. Its totient is φ = 1094763040.

The previous prime is 1368453797. The next prime is 1368453857. The reversal of 1368453805 is 5083548631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 603046249 + 765407556 = 24557^2 + 27666^2 .

It is not a de Polignac number, because 1368453805 - 2³ = 1368453797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136845376 + ... + 136845385.

It is an arithmetic number, because the mean of its divisors is an integer number (410536143).

Almost surely, 2^1368453805 is an apocalyptic number.

It is an amenable number.

1368453805 is a deficient number, since it is larger than the sum of its proper divisors (273690767).

1368453805 is an equidigital number, since it uses as much as digits as its factorization.

1368453805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273690766.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 1368453805 is about 36992.6182501320. The cubic root of 1368453805 is about 1110.2225577057. Note that the first 3 decimals are identical.

The spelling of 1368453805 in words is "one billion, three hundred sixty-eight million, four hundred fifty-three thousand, eight hundred five".