1191138034 has 4 divisors (see below), whose sum is σ = 1786707054. Its totient is φ = 595569016.

The previous prime is 1191138001. The next prime is 1191138073. The reversal of 1191138034 is 4308311911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 734247409 + 456890625 = 27097^2 + 21375^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1191137987 and 1191138005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297784507 + ... + 297784510.

Almost surely, 2^1191138034 is an apocalyptic number.

1191138034 is a deficient number, since it is larger than the sum of its proper divisors (595569020).

1191138034 is an equidigital number, since it uses as much as digits as its factorization.

1191138034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595569019.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1191138034 is about 34512.8676583097. The cubic root of 1191138034 is about 1060.0362020388.

Adding to 1191138034 its reverse (4308311911), we get a palindrome (5499449945).

The spelling of 1191138034 in words is "one billion, one hundred ninety-one million, one hundred thirty-eight thousand, thirty-four".