1239841087 has 2 divisors, whose sum is σ = 1239841088. Its totient is φ = 1239841086.

The previous prime is 1239841079. The next prime is 1239841117. The reversal of 1239841087 is 7801489321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1239841087 - 2³ = 1239841079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239841007) 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, 619920543 + 619920544.

It is an arithmetic number, because the mean of its divisors is an integer number (619920544).

Almost surely, 2^1239841087 is an apocalyptic number.

1239841087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239841087 is an equidigital number, since it uses as much as digits as its factorization.

1239841087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1239841087 is about 35211.3772380462. The cubic root of 1239841087 is about 1074.2911749081.

The spelling of 1239841087 in words is "one billion, two hundred thirty-nine million, eight hundred forty-one thousand, eighty-seven".