1980517087 has 2 divisors, whose sum is σ = 1980517088. Its totient is φ = 1980517086.

The previous prime is 1980516971. The next prime is 1980517109. The reversal of 1980517087 is 7807150891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1980517087 - 2¹⁹ = 1979992799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980511087) 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, 990258543 + 990258544.

It is an arithmetic number, because the mean of its divisors is an integer number (990258544).

Almost surely, 2^1980517087 is an apocalyptic number.

1980517087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980517087 is an equidigital number, since it uses as much as digits as its factorization.

1980517087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 1980517087 is about 44503.0008763454. Note that the first 3 decimals coincide. The cubic root of 1980517087 is about 1255.8165375584.

The spelling of 1980517087 in words is "one billion, nine hundred eighty million, five hundred seventeen thousand, eighty-seven".