1145663191 has 2 divisors, whose sum is σ = 1145663192. Its totient is φ = 1145663190.

The previous prime is 1145663177. The next prime is 1145663203. The reversal of 1145663191 is 1913665411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1145663191 - 2¹³ = 1145654999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1145663191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145663131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572831595 + 572831596.

It is an arithmetic number, because the mean of its divisors is an integer number (572831596).

Almost surely, 2^1145663191 is an apocalyptic number.

1145663191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145663191 is an equidigital number, since it uses as much as digits as its factorization.

1145663191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 1145663191 is about 33847.6467571972. The cubic root of 1145663191 is about 1046.3709001191.

It can be divided in two parts, 11456 and 63191, that added together give a palindrome (74647).

The spelling of 1145663191 in words is "one billion, one hundred forty-five million, six hundred sixty-three thousand, one hundred ninety-one".