1198959887 has 2 divisors, whose sum is σ = 1198959888. Its totient is φ = 1198959886.

The previous prime is 1198959857. The next prime is 1198959917. The reversal of 1198959887 is 7889598911.

It is a balanced prime because it is at equal distance from previous prime (1198959857) and next prime (1198959917).

It is a cyclic number.

It is not a de Polignac number, because 1198959887 - 2⁶ = 1198959823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198959857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599479943 + 599479944.

It is an arithmetic number, because the mean of its divisors is an integer number (599479944).

Almost surely, 2^1198959887 is an apocalyptic number.

1198959887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198959887 is an equidigital number, since it uses as much as digits as its factorization.

1198959887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 65.

The square root of 1198959887 is about 34626.0001588402. Note that the first 3 decimals coincide. The cubic root of 1198959887 is about 1062.3514568255.

The spelling of 1198959887 in words is "one billion, one hundred ninety-eight million, nine hundred fifty-nine thousand, eight hundred eighty-seven".