1368852005 has 4 divisors (see below), whose sum is σ = 1642622412. Its totient is φ = 1095081600.

The previous prime is 1368851989. The next prime is 1368852013. The reversal of 1368852005 is 5002588631.

It is a Cunningham number, because it is equal to 36998²+1.

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 492751204 + 876100801 = 22198^2 + 29599^2 .

It is not a de Polignac number, because 1368852005 - 2⁴ = 1368851989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1368852005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136885196 + ... + 136885205.

It is an arithmetic number, because the mean of its divisors is an integer number (410655603).

Almost surely, 2^1368852005 is an apocalyptic number.

It is an amenable number.

1368852005 is a deficient number, since it is larger than the sum of its proper divisors (273770407).

1368852005 is an equidigital number, since it uses as much as digits as its factorization.

1368852005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273770406.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1368852005 is about 36998.0000135142. Note that the first 4 decimals coincide. The cubic root of 1368852005 is about 1110.3302334263.

The spelling of 1368852005 in words is "one billion, three hundred sixty-eight million, eight hundred fifty-two thousand, five".