1982905867 has 2 divisors, whose sum is σ = 1982905868. Its totient is φ = 1982905866.

The previous prime is 1982905819. The next prime is 1982905871. The reversal of 1982905867 is 7685092891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1982905867 - 2¹⁵ = 1982873099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1982905367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991452933 + 991452934.

It is an arithmetic number, because the mean of its divisors is an integer number (991452934).

Almost surely, 2^1982905867 is an apocalyptic number.

1982905867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982905867 is an equidigital number, since it uses as much as digits as its factorization.

1982905867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 1982905867 is about 44529.8312033630. The cubic root of 1982905867 is about 1256.3212313694.

The spelling of 1982905867 in words is "one billion, nine hundred eighty-two million, nine hundred five thousand, eight hundred sixty-seven".