1368138369 has 32 divisors (see below), whose sum is σ = 2019999744. Its totient is φ = 818395200.

The previous prime is 1368138293. The next prime is 1368138379. The reversal of 1368138369 is 9638318631.

It is a happy number.

It is not a de Polignac number, because 1368138369 - 2⁸ = 1368138113 is a prime.

It is a super-2 number, since 2×1368138369² = 3743605193459960322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1368138379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274312 + ... + 279254.

It is an arithmetic number, because the mean of its divisors is an integer number (63124992).

Almost surely, 2^1368138369 is an apocalyptic number.

It is an amenable number.

1368138369 is a deficient number, since it is larger than the sum of its proper divisors (651861375).

1368138369 is a wasteful number, since it uses less digits than its factorization.

1368138369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157.

The product of its digits is 559872, while the sum is 48.

The square root of 1368138369 is about 36988.3545051682. The cubic root of 1368138369 is about 1110.1372470500.

The spelling of 1368138369 in words is "one billion, three hundred sixty-eight million, one hundred thirty-eight thousand, three hundred sixty-nine".