1144395877 has 4 divisors (see below), whose sum is σ = 1145184940. Its totient is φ = 1143606816.

The previous prime is 1144395871. The next prime is 1144395881. The reversal of 1144395877 is 7785934411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1065434881 + 78960996 = 32641^2 + 8886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144395877 - 2¹¹ = 1144393829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1144395877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144395871) 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, 392352 + ... + 395257.

It is an arithmetic number, because the mean of its divisors is an integer number (286296235).

Almost surely, 2^1144395877 is an apocalyptic number.

It is an amenable number.

1144395877 is a deficient number, since it is larger than the sum of its proper divisors (789063).

1144395877 is an equidigital number, since it uses as much as digits as its factorization.

1144395877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789062.

The product of its digits is 846720, while the sum is 49.

The square root of 1144395877 is about 33828.9207188169. The cubic root of 1144395877 is about 1045.9849316061.

The spelling of 1144395877 in words is "one billion, one hundred forty-four million, three hundred ninety-five thousand, eight hundred seventy-seven".