1189746487 has 8 divisors (see below), whose sum is σ = 1220229360. Its totient is φ = 1159333440.

The previous prime is 1189746473. The next prime is 1189746521. The reversal of 1189746487 is 7846479811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189746487 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 (1189746407) 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 7 ways as a sum of consecutive naturals, for example, 17964 + ... + 51982.

It is an arithmetic number, because the mean of its divisors is an integer number (152528670).

Almost surely, 2^1189746487 is an apocalyptic number.

1189746487 is a deficient number, since it is larger than the sum of its proper divisors (30482873).

1189746487 is an equidigital number, since it uses as much as digits as its factorization.

1189746487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34913.

The product of its digits is 2709504, while the sum is 55.

The square root of 1189746487 is about 34492.7019382362. The cubic root of 1189746487 is about 1059.6232454229.

The spelling of 1189746487 in words is "one billion, one hundred eighty-nine million, seven hundred forty-six thousand, four hundred eighty-seven".