143491917887 has 4 divisors (see below), whose sum is σ = 144284691096. Its totient is φ = 142699144680.

The previous prime is 143491917859. The next prime is 143491917917. The reversal of 143491917887 is 788719194341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788719194341 = 13 ⋅60670707257.

It is a cyclic number.

It is not a de Polignac number, because 143491917887 - 2³⁶ = 74772441151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143491917587) 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, 396386333 + ... + 396386694.

It is an arithmetic number, because the mean of its divisors is an integer number (36071172774).

Almost surely, 2^143491917887 is an apocalyptic number.

143491917887 is a deficient number, since it is larger than the sum of its proper divisors (792773209).

143491917887 is an equidigital number, since it uses as much as digits as its factorization.

143491917887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792773208.

The product of its digits is 12192768, while the sum is 62.

The spelling of 143491917887 in words is "one hundred forty-three billion, four hundred ninety-one million, nine hundred seventeen thousand, eight hundred eighty-seven".