1149455947 has 2 divisors, whose sum is σ = 1149455948. Its totient is φ = 1149455946.

The previous prime is 1149455933. The next prime is 1149455999. The reversal of 1149455947 is 7495549411.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149455947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149455947.

It is not a weakly prime, because it can be changed into another prime (1149455927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574727973 + 574727974.

It is an arithmetic number, because the mean of its divisors is an integer number (574727974).

Almost surely, 2^1149455947 is an apocalyptic number.

1149455947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149455947 is an equidigital number, since it uses as much as digits as its factorization.

1149455947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The square root of 1149455947 is about 33903.6273428080. The cubic root of 1149455947 is about 1047.5243101123.

The spelling of 1149455947 in words is "one billion, one hundred forty-nine million, four hundred fifty-five thousand, nine hundred forty-seven".