1368933491 has 2 divisors, whose sum is σ = 1368933492. Its totient is φ = 1368933490.

The previous prime is 1368933479. The next prime is 1368933493. The reversal of 1368933491 is 1943398631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1368933491 - 2⁶ = 1368933427 is a prime.

Together with 1368933493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1368933493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684466745 + 684466746.

It is an arithmetic number, because the mean of its divisors is an integer number (684466746).

Almost surely, 2^1368933491 is an apocalyptic number.

1368933491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368933491 is an equidigital number, since it uses as much as digits as its factorization.

1368933491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 1368933491 is about 36999.1012188134. The cubic root of 1368933491 is about 1110.3522651663.

The spelling of 1368933491 in words is "one billion, three hundred sixty-eight million, nine hundred thirty-three thousand, four hundred ninety-one".