1144187913 has 8 divisors (see below), whose sum is σ = 1664273376. Its totient is φ = 693447200.

The previous prime is 1144187909. The next prime is 1144187917. The reversal of 1144187913 is 3197814411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1144187909) and next prime (1144187917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1144187913 - 2² = 1144187909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144187917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17336148 + ... + 17336213.

It is an arithmetic number, because the mean of its divisors is an integer number (208034172).

Almost surely, 2^1144187913 is an apocalyptic number.

It is an amenable number.

1144187913 is a deficient number, since it is larger than the sum of its proper divisors (520085463).

1144187913 is a wasteful number, since it uses less digits than its factorization.

1144187913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34672375.

The product of its digits is 24192, while the sum is 39.

The square root of 1144187913 is about 33825.8468186681. The cubic root of 1144187913 is about 1045.9215676390.

The spelling of 1144187913 in words is "one billion, one hundred forty-four million, one hundred eighty-seven thousand, nine hundred thirteen".