1144587887 has 4 divisors (see below), whose sum is σ = 1144656216. Its totient is φ = 1144519560.

The previous prime is 1144587877. The next prime is 1144587901. The reversal of 1144587887 is 7887854411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7887854411 = 71 ⋅111096541.

It is a cyclic number.

It is not a de Polignac number, because 1144587887 - 2⁶ = 1144587823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144587817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9953 + ... + 48869.

It is an arithmetic number, because the mean of its divisors is an integer number (286164054).

Almost surely, 2^1144587887 is an apocalyptic number.

1144587887 is a deficient number, since it is larger than the sum of its proper divisors (68329).

1144587887 is an equidigital number, since it uses as much as digits as its factorization.

1144587887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68328.

The product of its digits is 2007040, while the sum is 53.

The square root of 1144587887 is about 33831.7585561259. The cubic root of 1144587887 is about 1046.0434277784.

The spelling of 1144587887 in words is "one billion, one hundred forty-four million, five hundred eighty-seven thousand, eight hundred eighty-seven".