143999965 has 8 divisors (see below), whose sum is σ = 172869048. Its totient is φ = 115153920.

The previous prime is 143999909. The next prime is 143999971. The reversal of 143999965 is 569999341.

143999965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 47961 + 143952004 = 219^2 + 11998^2 .

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

It is not a de Polignac number, because 143999965 - 2¹³ = 143991773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14445 + ... + 22285.

It is an arithmetic number, because the mean of its divisors is an integer number (21608631).

Almost surely, 2^143999965 is an apocalyptic number.

It is an amenable number.

143999965 is a deficient number, since it is larger than the sum of its proper divisors (28869083).

143999965 is an equidigital number, since it uses as much as digits as its factorization.

143999965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11519.

The product of its digits is 2361960, while the sum is 55.

The square root of 143999965 is about 11999.9985416666. The cubic root of 143999965 is about 524.1482363761.

The spelling of 143999965 in words is "one hundred forty-three million, nine hundred ninety-nine thousand, nine hundred sixty-five".