1189676638 has 4 divisors (see below), whose sum is σ = 1784514960. Its totient is φ = 594838318.

The previous prime is 1189676581. The next prime is 1189676641. The reversal of 1189676638 is 8366769811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8366769811 = 30859 ⋅271129.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297419158 + ... + 297419161.

It is an arithmetic number, because the mean of its divisors is an integer number (446128740).

Almost surely, 2^1189676638 is an apocalyptic number.

1189676638 is a deficient number, since it is larger than the sum of its proper divisors (594838322).

1189676638 is an equidigital number, since it uses as much as digits as its factorization.

1189676638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594838321.

The product of its digits is 2612736, while the sum is 55.

The square root of 1189676638 is about 34491.6894048407. The cubic root of 1189676638 is about 1059.6025084919.

The spelling of 1189676638 in words is "one billion, one hundred eighty-nine million, six hundred seventy-six thousand, six hundred thirty-eight".