1191088651 has 2 divisors, whose sum is σ = 1191088652. Its totient is φ = 1191088650.

The previous prime is 1191088627. The next prime is 1191088669. The reversal of 1191088651 is 1568801911.

It is a strong prime.

It is an emirp because it is prime and its reverse (1568801911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1191088651 - 2¹³ = 1191080459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191088621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595544325 + 595544326.

It is an arithmetic number, because the mean of its divisors is an integer number (595544326).

Almost surely, 2^1191088651 is an apocalyptic number.

1191088651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191088651 is an equidigital number, since it uses as much as digits as its factorization.

1191088651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 40.

The square root of 1191088651 is about 34512.1522220797. The cubic root of 1191088651 is about 1060.0215526056.

The spelling of 1191088651 in words is "one billion, one hundred ninety-one million, eighty-eight thousand, six hundred fifty-one".