1368637329 has 4 divisors (see below), whose sum is σ = 1824849776. Its totient is φ = 912424884.

The previous prime is 1368637271. The next prime is 1368637331. The reversal of 1368637329 is 9237368631.

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: 9237368631 = 3 ⋅3079122877.

It is not a de Polignac number, because 1368637329 - 2¹⁷ = 1368506257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368637399) 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, 228106219 + ... + 228106224.

It is an arithmetic number, because the mean of its divisors is an integer number (456212444).

Almost surely, 2^1368637329 is an apocalyptic number.

It is an amenable number.

1368637329 is a deficient number, since it is larger than the sum of its proper divisors (456212447).

1368637329 is an equidigital number, since it uses as much as digits as its factorization.

1368637329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456212446.

The product of its digits is 979776, while the sum is 48.

The square root of 1368637329 is about 36995.0987159110. The cubic root of 1368637329 is about 1110.2721863148.

It can be divided in two parts, 13686 and 37329, that added together give a palindrome (51015).

The spelling of 1368637329 in words is "one billion, three hundred sixty-eight million, six hundred thirty-seven thousand, three hundred twenty-nine".