1987948087 has 2 divisors, whose sum is σ = 1987948088. Its totient is φ = 1987948086.

The previous prime is 1987948003. The next prime is 1987948103. The reversal of 1987948087 is 7808497891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1987948087 - 2¹¹ = 1987946039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987978087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993974043 + 993974044.

It is an arithmetic number, because the mean of its divisors is an integer number (993974044).

Almost surely, 2^1987948087 is an apocalyptic number.

1987948087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987948087 is an equidigital number, since it uses as much as digits as its factorization.

1987948087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 61.

The square root of 1987948087 is about 44586.4114613410. The cubic root of 1987948087 is about 1257.3852062789.

The spelling of 1987948087 in words is "one billion, nine hundred eighty-seven million, nine hundred forty-eight thousand, eighty-seven".