1868339497 has 2 divisors, whose sum is σ = 1868339498. Its totient is φ = 1868339496.

The previous prime is 1868339479. The next prime is 1868339533. The reversal of 1868339497 is 7949338681.

Together with previous prime (1868339479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1778393241 + 89946256 = 42171^2 + 9484^2 .

It is a cyclic number.

It is not a de Polignac number, because 1868339497 - 2²⁷ = 1734121769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1868339437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934169748 + 934169749.

It is an arithmetic number, because the mean of its divisors is an integer number (934169749).

Almost surely, 2^1868339497 is an apocalyptic number.

It is an amenable number.

1868339497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868339497 is an equidigital number, since it uses as much as digits as its factorization.

1868339497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 1868339497 is about 43224.2929034125. The cubic root of 1868339497 is about 1231.6441970319.

The spelling of 1868339497 in words is "one billion, eight hundred sixty-eight million, three hundred thirty-nine thousand, four hundred ninety-seven".