1368838591 has 2 divisors, whose sum is σ = 1368838592. Its totient is φ = 1368838590.

The previous prime is 1368838567. The next prime is 1368838619. The reversal of 1368838591 is 1958388631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1368838591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368838531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684419295 + 684419296.

It is an arithmetic number, because the mean of its divisors is an integer number (684419296).

Almost surely, 2^1368838591 is an apocalyptic number.

1368838591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368838591 is an equidigital number, since it uses as much as digits as its factorization.

1368838591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 52.

The square root of 1368838591 is about 36997.8187330010. The cubic root of 1368838591 is about 1110.3266065384.

The spelling of 1368838591 in words is "one billion, three hundred sixty-eight million, eight hundred thirty-eight thousand, five hundred ninety-one".