143945387 has 4 divisors (see below), whose sum is σ = 151521480. Its totient is φ = 136369296.

The previous prime is 143945377. The next prime is 143945393. The reversal of 143945387 is 783549341.

143945387 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 an emirpimes, since its reverse is a distinct semiprime: 783549341 = 19 ⋅41239439.

It is a cyclic number.

It is not a de Polignac number, because 143945387 - 2⁴ = 143945371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143945317) 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, 3788018 + ... + 3788055.

It is an arithmetic number, because the mean of its divisors is an integer number (37880370).

Almost surely, 2^143945387 is an apocalyptic number.

143945387 is a deficient number, since it is larger than the sum of its proper divisors (7576093).

143945387 is an equidigital number, since it uses as much as digits as its factorization.

143945387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576092.

The product of its digits is 362880, while the sum is 44.

The square root of 143945387 is about 11997.7242425387. The cubic root of 143945387 is about 524.0820081716.

The spelling of 143945387 in words is "one hundred forty-three million, nine hundred forty-five thousand, three hundred eighty-seven".