1149555647 has 2 divisors, whose sum is σ = 1149555648. Its totient is φ = 1149555646.

The previous prime is 1149555619. The next prime is 1149555661. The reversal of 1149555647 is 7465559411.

It is a strong prime.

It is an emirp because it is prime and its reverse (7465559411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1149555647 - 2²⁰ = 1148507071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1149552647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574777823 + 574777824.

It is an arithmetic number, because the mean of its divisors is an integer number (574777824).

Almost surely, 2^1149555647 is an apocalyptic number.

1149555647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149555647 is an equidigital number, since it uses as much as digits as its factorization.

1149555647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 47.

The square root of 1149555647 is about 33905.0976550725. The cubic root of 1149555647 is about 1047.5545954992.

The spelling of 1149555647 in words is "one billion, one hundred forty-nine million, five hundred fifty-five thousand, six hundred forty-seven".