1189798741 has 4 divisors (see below), whose sum is σ = 1189869484. Its totient is φ = 1189728000.

The previous prime is 1189798739. The next prime is 1189798769. The reversal of 1189798741 is 1478979811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 654848100 + 534950641 = 25590^2 + 23129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189798741 - 2¹ = 1189798739 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 (1189798711) 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 3 ways as a sum of consecutive naturals, for example, 5941 + ... + 49141.

It is an arithmetic number, because the mean of its divisors is an integer number (297467371).

Almost surely, 2^1189798741 is an apocalyptic number.

It is an amenable number.

1189798741 is a deficient number, since it is larger than the sum of its proper divisors (70743).

1189798741 is an equidigital number, since it uses as much as digits as its factorization.

1189798741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70742.

The product of its digits is 1016064, while the sum is 55.

The square root of 1189798741 is about 34493.4593944997. The cubic root of 1189798741 is about 1059.6387581794.

The spelling of 1189798741 in words is "one billion, one hundred eighty-nine million, seven hundred ninety-eight thousand, seven hundred forty-one".