1144319987 has 2 divisors, whose sum is σ = 1144319988. Its totient is φ = 1144319986.

The previous prime is 1144319959. The next prime is 1144320029. The reversal of 1144319987 is 7899134411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1144319987 - 2⁸ = 1144319731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144319947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572159993 + 572159994.

It is an arithmetic number, because the mean of its divisors is an integer number (572159994).

Almost surely, 2^1144319987 is an apocalyptic number.

1144319987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144319987 is an equidigital number, since it uses as much as digits as its factorization.

1144319987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 1144319987 is about 33827.7990268359. The cubic root of 1144319987 is about 1045.9618097847.

The spelling of 1144319987 in words is "one billion, one hundred forty-four million, three hundred nineteen thousand, nine hundred eighty-seven".