1195649887 has 2 divisors, whose sum is σ = 1195649888. Its totient is φ = 1195649886.

The previous prime is 1195649867. The next prime is 1195649891. The reversal of 1195649887 is 7889465911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1195649887 - 2⁷ = 1195649759 is a prime.

It is a super-2 number, since 2×1195649887² = 2859157304566225538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1195649867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597824943 + 597824944.

It is an arithmetic number, because the mean of its divisors is an integer number (597824944).

Almost surely, 2^1195649887 is an apocalyptic number.

1195649887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1195649887 is an equidigital number, since it uses as much as digits as its factorization.

1195649887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 58.

The square root of 1195649887 is about 34578.1706716824. The cubic root of 1195649887 is about 1061.3729352875.

The spelling of 1195649887 in words is "one billion, one hundred ninety-five million, six hundred forty-nine thousand, eight hundred eighty-seven".