1189074749 has 4 divisors (see below), whose sum is σ = 1189144320. Its totient is φ = 1189005180.

The previous prime is 1189074727. The next prime is 1189074767. The reversal of 1189074749 is 9474709811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189074749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1189074697 and 1189074706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189074779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10532 + ... + 49890.

It is an arithmetic number, because the mean of its divisors is an integer number (297286080).

Almost surely, 2^1189074749 is an apocalyptic number.

It is an amenable number.

1189074749 is a deficient number, since it is larger than the sum of its proper divisors (69571).

1189074749 is an equidigital number, since it uses as much as digits as its factorization.

1189074749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69570.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 1189074749 is about 34482.9631702381. The cubic root of 1189074749 is about 1059.4237846667.

The spelling of 1189074749 in words is "one billion, one hundred eighty-nine million, seventy-four thousand, seven hundred forty-nine".