1149591643 has 2 divisors, whose sum is σ = 1149591644. Its totient is φ = 1149591642.

The previous prime is 1149591623. The next prime is 1149591649. The reversal of 1149591643 is 3461959411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149591643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149591643.

It is not a weakly prime, because it can be changed into another prime (1149591649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574795821 + 574795822.

It is an arithmetic number, because the mean of its divisors is an integer number (574795822).

Almost surely, 2^1149591643 is an apocalyptic number.

1149591643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149591643 is an equidigital number, since it uses as much as digits as its factorization.

1149591643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 1149591643 is about 33905.6284855479. The cubic root of 1149591643 is about 1047.5655293998.

The spelling of 1149591643 in words is "one billion, one hundred forty-nine million, five hundred ninety-one thousand, six hundred forty-three".