1368013139 has 4 divisors (see below), whose sum is σ = 1378785024. Its totient is φ = 1357241256.

The previous prime is 1368013121. The next prime is 1368013151. The reversal of 1368013139 is 9313108631.

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

It is a cyclic number.

It is not a de Polignac number, because 1368013139 - 2²⁴ = 1351235923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1368013099 and 1368013108.

It is not an unprimeable number, because it can be changed into a prime (1368013109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5385752 + ... + 5386005.

It is an arithmetic number, because the mean of its divisors is an integer number (344696256).

Almost surely, 2^1368013139 is an apocalyptic number.

1368013139 is a deficient number, since it is larger than the sum of its proper divisors (10771885).

1368013139 is a wasteful number, since it uses less digits than its factorization.

1368013139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10771884.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1368013139 is about 36986.6616363251. The cubic root of 1368013139 is about 1110.1033745674.

The spelling of 1368013139 in words is "one billion, three hundred sixty-eight million, thirteen thousand, one hundred thirty-nine".