1368879181 has 2 divisors, whose sum is σ = 1368879182. Its totient is φ = 1368879180.

The previous prime is 1368879179. The next prime is 1368879191. The reversal of 1368879181 is 1819788631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1362274281 + 6604900 = 36909^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368879181 - 2¹ = 1368879179 is a prime.

It is a super-2 number, since 2×1368879181² = 3747660424350461522, which contains 22 as substring.

Together with 1368879179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368879131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684439590 + 684439591.

It is an arithmetic number, because the mean of its divisors is an integer number (684439591).

Almost surely, 2^1368879181 is an apocalyptic number.

It is an amenable number.

1368879181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368879181 is an equidigital number, since it uses as much as digits as its factorization.

1368879181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 52.

The square root of 1368879181 is about 36998.3672747866. The cubic root of 1368879181 is about 1110.3375812221.

The spelling of 1368879181 in words is "one billion, three hundred sixty-eight million, eight hundred seventy-nine thousand, one hundred eighty-one".