1144505917 has 8 divisors (see below), whose sum is σ = 1148068224. Its totient is φ = 1140950448.

The previous prime is 1144505891. The next prime is 1144505953. The reversal of 1144505917 is 7195054411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144505917 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 (1144505017) 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, 641008 + ... + 642790.

It is an arithmetic number, because the mean of its divisors is an integer number (143508528).

Almost surely, 2^1144505917 is an apocalyptic number.

It is an amenable number.

1144505917 is a deficient number, since it is larger than the sum of its proper divisors (3562307).

1144505917 is an equidigital number, since it uses as much as digits as its factorization.

1144505917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 1144505917 is about 33830.5470987390. The cubic root of 1144505917 is about 1046.0184562792.

The spelling of 1144505917 in words is "one billion, one hundred forty-four million, five hundred five thousand, nine hundred seventeen".