1149638287 has 4 divisors (see below), whose sum is σ = 1313872336. Its totient is φ = 985404240.

The previous prime is 1149638261. The next prime is 1149638297. The reversal of 1149638287 is 7828369411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7828369411 = 33427 ⋅234193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149638287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149638287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149638297) 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 in 3 ways as a sum of consecutive naturals, for example, 82117014 + ... + 82117027.

It is an arithmetic number, because the mean of its divisors is an integer number (328468084).

Almost surely, 2^1149638287 is an apocalyptic number.

1149638287 is a deficient number, since it is larger than the sum of its proper divisors (164234049).

1149638287 is an equidigital number, since it uses as much as digits as its factorization.

1149638287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164234048.

The product of its digits is 580608, while the sum is 49.

The square root of 1149638287 is about 33906.3163289674. The cubic root of 1149638287 is about 1047.5796973252.

The spelling of 1149638287 in words is "one billion, one hundred forty-nine million, six hundred thirty-eight thousand, two hundred eighty-seven".