143912969 has 4 divisors (see below), whose sum is σ = 146272260. Its totient is φ = 141553680.

The previous prime is 143912947. The next prime is 143912987. The reversal of 143912969 is 969219341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50055625 + 93857344 = 7075^2 + 9688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143912969 is a prime.

It is a super-2 number, since 2×143912969² = 41421885292789922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143912999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179554 + ... + 1179675.

It is an arithmetic number, because the mean of its divisors is an integer number (36568065).

Almost surely, 2^143912969 is an apocalyptic number.

It is an amenable number.

143912969 is a deficient number, since it is larger than the sum of its proper divisors (2359291).

143912969 is an equidigital number, since it uses as much as digits as its factorization.

143912969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359290.

The product of its digits is 104976, while the sum is 44.

The square root of 143912969 is about 11996.3731602514. The cubic root of 143912969 is about 524.0426623094.

The spelling of 143912969 in words is "one hundred forty-three million, nine hundred twelve thousand, nine hundred sixty-nine".