143430985 has 8 divisors (see below), whose sum is σ = 175365000. Its totient is φ = 112579584.

The previous prime is 143430979. The next prime is 143431003. The reversal of 143430985 is 589034341.

143430985 = 8468² + 8469².

It can be written as a sum of positive squares in 4 ways, for example, as 71707024 + 71723961 = 8468^2 + 8469^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 143430985 - 2⁷ = 143430857 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 270360 + ... + 270889.

It is an arithmetic number, because the mean of its divisors is an integer number (21920625).

Almost surely, 2^143430985 is an apocalyptic number.

143430985 is the 8469-th centered square number.

It is an amenable number.

143430985 is a deficient number, since it is larger than the sum of its proper divisors (31934015).

143430985 is an equidigital number, since it uses as much as digits as its factorization.

143430985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541307.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 143430985 is about 11976.2675738312. The cubic root of 143430985 is about 523.4569780559.

The spelling of 143430985 in words is "one hundred forty-three million, four hundred thirty thousand, nine hundred eighty-five".