144661897 has 8 divisors (see below), whose sum is σ = 149399432. Its totient is φ = 139968000.

The previous prime is 144661883. The next prime is 144661931. The reversal of 144661897 is 798166441.

It can be written as a sum of positive squares in 4 ways, for example, as 34327881 + 110334016 = 5859^2 + 10504^2 .

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-144661897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144661807) 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, 4104 + ... + 17497.

It is an arithmetic number, because the mean of its divisors is an integer number (18674929).

Almost surely, 2^144661897 is an apocalyptic number.

It is an amenable number.

144661897 is a deficient number, since it is larger than the sum of its proper divisors (4737535).

144661897 is a wasteful number, since it uses less digits than its factorization.

144661897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21819.

The product of its digits is 290304, while the sum is 46.

The square root of 144661897 is about 12027.5474224798. The cubic root of 144661897 is about 524.9501352489.

The spelling of 144661897 in words is "one hundred forty-four million, six hundred sixty-one thousand, eight hundred ninety-seven".