1868368531 has 2 divisors, whose sum is σ = 1868368532. Its totient is φ = 1868368530.

The previous prime is 1868368457. The next prime is 1868368549. The reversal of 1868368531 is 1358638681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1868368531 - 2¹³ = 1868360339 is a prime.

It is a super-2 number, since 2×1868368531² = 6981601935262195922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1868368631) 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, 934184265 + 934184266.

It is an arithmetic number, because the mean of its divisors is an integer number (934184266).

Almost surely, 2^1868368531 is an apocalyptic number.

1868368531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868368531 is an equidigital number, since it uses as much as digits as its factorization.

1868368531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The square root of 1868368531 is about 43224.6287549124. The cubic root of 1868368531 is about 1231.6505769167.

The spelling of 1868368531 in words is "one billion, eight hundred sixty-eight million, three hundred sixty-eight thousand, five hundred thirty-one".