1191680487 has 12 divisors (see below), whose sum is σ = 1721727280. Its totient is φ = 794263968.

The previous prime is 1191680453. The next prime is 1191680521. The reversal of 1191680487 is 7840861911.

It is a happy number.

1191680487 is a `hidden beast` number, since 1 + 1 + 9 + 168 + 0 + 487 = 666.

It is an interprime number because it is at equal distance from previous prime (1191680453) and next prime (1191680521).

It is not a de Polignac number, because 1191680487 - 2¹⁶ = 1191614951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191680417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31398 + ... + 58044.

Almost surely, 2^1191680487 is an apocalyptic number.

1191680487 is a deficient number, since it is larger than the sum of its proper divisors (530046793).

1191680487 is a wasteful number, since it uses less digits than its factorization.

1191680487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31622 (or 31619 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1191680487 is about 34520.7254703606. The cubic root of 1191680487 is about 1060.1970937054.

The spelling of 1191680487 in words is "one billion, one hundred ninety-one million, six hundred eighty thousand, four hundred eighty-seven".