143491917889 has 4 divisors (see below), whose sum is σ = 145308271360. Its totient is φ = 141675564420.

The previous prime is 143491917859. The next prime is 143491917917. The reversal of 143491917889 is 988719194341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143491917889 - 2⁷ = 143491917761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143491917889.

It is not an unprimeable number, because it can be changed into a prime (143491917859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908176617 + ... + 908176774.

It is an arithmetic number, because the mean of its divisors is an integer number (36327067840).

Almost surely, 2^143491917889 is an apocalyptic number.

It is an amenable number.

143491917889 is a deficient number, since it is larger than the sum of its proper divisors (1816353471).

143491917889 is an equidigital number, since it uses as much as digits as its factorization.

143491917889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816353470.

The product of its digits is 15676416, while the sum is 64.

The spelling of 143491917889 in words is "one hundred forty-three billion, four hundred ninety-one million, nine hundred seventeen thousand, eight hundred eighty-nine".