1198441987 has 2 divisors, whose sum is σ = 1198441988. Its totient is φ = 1198441986.

The previous prime is 1198441793. The next prime is 1198441991. The reversal of 1198441987 is 7891448911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1198441987 - 2²³ = 1190053379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198441997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599220993 + 599220994.

It is an arithmetic number, because the mean of its divisors is an integer number (599220994).

Almost surely, 2^1198441987 is an apocalyptic number.

1198441987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198441987 is an equidigital number, since it uses as much as digits as its factorization.

1198441987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 52.

The square root of 1198441987 is about 34618.5208667268. The cubic root of 1198441987 is about 1062.1984711518.

The spelling of 1198441987 in words is "one billion, one hundred ninety-eight million, four hundred forty-one thousand, nine hundred eighty-seven".