1368049138 has 4 divisors (see below), whose sum is σ = 2052073710. Its totient is φ = 684024568.

The previous prime is 1368049129. The next prime is 1368049147. The reversal of 1368049138 is 8319408631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8319408631 = 60961 ⋅136471.

It is an interprime number because it is at equal distance from previous prime (1368049129) and next prime (1368049147).

It can be written as a sum of positive squares in only one way, i.e., 1278992169 + 89056969 = 35763^2 + 9437^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1368049094 and 1368049103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342012283 + ... + 342012286.

Almost surely, 2^1368049138 is an apocalyptic number.

1368049138 is a deficient number, since it is larger than the sum of its proper divisors (684024572).

1368049138 is an equidigital number, since it uses as much as digits as its factorization.

1368049138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684024571.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1368049138 is about 36987.1482815315. The cubic root of 1368049138 is about 1110.1131118669.

The spelling of 1368049138 in words is "one billion, three hundred sixty-eight million, forty-nine thousand, one hundred thirty-eight".