1144768487 has 4 divisors (see below), whose sum is σ = 1205019480. Its totient is φ = 1084517496.

The previous prime is 1144768477. The next prime is 1144768501. The reversal of 1144768487 is 7848674411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7848674411 = 79 ⋅99350309.

It is a cyclic number.

It is not a de Polignac number, because 1144768487 - 2¹² = 1144764391 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 (1144768477) 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, 30125468 + ... + 30125505.

It is an arithmetic number, because the mean of its divisors is an integer number (301254870).

Almost surely, 2^1144768487 is an apocalyptic number.

1144768487 is a deficient number, since it is larger than the sum of its proper divisors (60250993).

1144768487 is an equidigital number, since it uses as much as digits as its factorization.

1144768487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60250992.

The product of its digits is 1204224, while the sum is 50.

The square root of 1144768487 is about 33834.4275405983. The cubic root of 1144768487 is about 1046.0984419048.

The spelling of 1144768487 in words is "one billion, one hundred forty-four million, seven hundred sixty-eight thousand, four hundred eighty-seven".