143988693 has 4 divisors (see below), whose sum is σ = 191984928. Its totient is φ = 95992460.

The previous prime is 143988667. The next prime is 143988703. The reversal of 143988693 is 396889341.

143988693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 143988693 - 2⁶ = 143988629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143989693) 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, 23998113 + ... + 23998118.

It is an arithmetic number, because the mean of its divisors is an integer number (47996232).

Almost surely, 2^143988693 is an apocalyptic number.

It is an amenable number.

143988693 is a deficient number, since it is larger than the sum of its proper divisors (47996235).

143988693 is an equidigital number, since it uses as much as digits as its factorization.

143988693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47996234.

The product of its digits is 1119744, while the sum is 51.

The square root of 143988693 is about 11999.5288657514. The cubic root of 143988693 is about 524.1345596295.

The spelling of 143988693 in words is "one hundred forty-three million, nine hundred eighty-eight thousand, six hundred ninety-three".