1931982434887 has 2 divisors, whose sum is σ = 1931982434888. Its totient is φ = 1931982434886.

The previous prime is 1931982434849. The next prime is 1931982434903. The reversal of 1931982434887 is 7884342891391.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1931982434887 is a prime.

It is a super-2 number, since 2×1931982434887² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1931982434807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965991217443 + 965991217444.

It is an arithmetic number, because the mean of its divisors is an integer number (965991217444).

Almost surely, 2^{1931982434887} is an apocalyptic number.

1931982434887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931982434887 is an equidigital number, since it uses as much as digits as its factorization.

1931982434887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83607552, while the sum is 67.

The spelling of 1931982434887 in words is "one trillion, nine hundred thirty-one billion, nine hundred eighty-two million, four hundred thirty-four thousand, eight hundred eighty-seven".