1868642093 has 2 divisors, whose sum is σ = 1868642094. Its totient is φ = 1868642092.

The previous prime is 1868642053. The next prime is 1868642119. The reversal of 1868642093 is 3902468681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1577837284 + 290804809 = 39722^2 + 17053^2 .

It is an emirp because it is prime and its reverse (3902468681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1868642093 - 2⁸ = 1868641837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868642003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934321046 + 934321047.

It is an arithmetic number, because the mean of its divisors is an integer number (934321047).

Almost surely, 2^1868642093 is an apocalyptic number.

It is an amenable number.

1868642093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868642093 is an equidigital number, since it uses as much as digits as its factorization.

1868642093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 1868642093 is about 43227.7930618717. The cubic root of 1868642093 is about 1231.7106857490.

The spelling of 1868642093 in words is "one billion, eight hundred sixty-eight million, six hundred forty-two thousand, ninety-three".