1144547997 has 8 divisors (see below), whose sum is σ = 1526411520. Its totient is φ = 762858240.

The previous prime is 1144547977. The next prime is 1144548007. The reversal of 1144547997 is 7997454411.

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

It is not a de Polignac number, because 1144547997 - 2¹¹ = 1144545949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144547927) 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, 27204 + ... + 55037.

It is an arithmetic number, because the mean of its divisors is an integer number (190801440).

Almost surely, 2^1144547997 is an apocalyptic number.

It is an amenable number.

1144547997 is a deficient number, since it is larger than the sum of its proper divisors (381863523).

1144547997 is an equidigital number, since it uses as much as digits as its factorization.

1144547997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86883.

The product of its digits is 1270080, while the sum is 51.

The square root of 1144547997 is about 33831.1690161602. The cubic root of 1144547997 is about 1046.0312757607.

The spelling of 1144547997 in words is "one billion, one hundred forty-four million, five hundred forty-seven thousand, nine hundred ninety-seven".