1144087993 has 2 divisors, whose sum is σ = 1144087994. Its totient is φ = 1144087992.

The previous prime is 1144087979. The next prime is 1144087999. The reversal of 1144087993 is 3997804411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1086889024 + 57198969 = 32968^2 + 7563^2 .

It is an emirp because it is prime and its reverse (3997804411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144087993 - 2⁹ = 1144087481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144087999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572043996 + 572043997.

It is an arithmetic number, because the mean of its divisors is an integer number (572043997).

Almost surely, 2^1144087993 is an apocalyptic number.

It is an amenable number.

1144087993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144087993 is an equidigital number, since it uses as much as digits as its factorization.

1144087993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1144087993 is about 33824.3698093549. The cubic root of 1144087993 is about 1045.8911205640.

The spelling of 1144087993 in words is "one billion, one hundred forty-four million, eighty-seven thousand, nine hundred ninety-three".