1987850959 has 2 divisors, whose sum is σ = 1987850960. Its totient is φ = 1987850958.

The previous prime is 1987850897. The next prime is 1987850983. The reversal of 1987850959 is 9590587891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1987850959 - 2¹³ = 1987842767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1987850897 and 1987850906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987850159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993925479 + 993925480.

It is an arithmetic number, because the mean of its divisors is an integer number (993925480).

Almost surely, 2^1987850959 is an apocalyptic number.

1987850959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987850959 is an equidigital number, since it uses as much as digits as its factorization.

1987850959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8164800, while the sum is 61.

The square root of 1987850959 is about 44585.3222372565. The cubic root of 1987850959 is about 1257.3647279944.

The spelling of 1987850959 in words is "one billion, nine hundred eighty-seven million, eight hundred fifty thousand, nine hundred fifty-nine".