1191179641 has 2 divisors, whose sum is σ = 1191179642. Its totient is φ = 1191179640.

The previous prime is 1191179629. The next prime is 1191179651. The reversal of 1191179641 is 1469711911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177519225 + 13660416 = 34315^2 + 3696^2 .

It is an emirp because it is prime and its reverse (1469711911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1191179641 - 2¹⁷ = 1191048569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1191179594 and 1191179603.

It is not a weakly prime, because it can be changed into another prime (1191179651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595589820 + 595589821.

It is an arithmetic number, because the mean of its divisors is an integer number (595589821).

Almost surely, 2^1191179641 is an apocalyptic number.

It is an amenable number.

1191179641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191179641 is an equidigital number, since it uses as much as digits as its factorization.

1191179641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 40.

The square root of 1191179641 is about 34513.4704282256. The cubic root of 1191179641 is about 1060.0485444126.

The spelling of 1191179641 in words is "one billion, one hundred ninety-one million, one hundred seventy-nine thousand, six hundred forty-one".