143985897 has 32 divisors (see below), whose sum is σ = 234178560. Its totient is φ = 86711760.

The previous prime is 143985889. The next prime is 143985929. The reversal of 143985897 is 798589341.

It is not a de Polignac number, because 143985897 - 2³ = 143985889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143985797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48148 + ... + 51050.

It is an arithmetic number, because the mean of its divisors is an integer number (7318080).

Almost surely, 2^143985897 is an apocalyptic number.

It is an amenable number.

143985897 is a deficient number, since it is larger than the sum of its proper divisors (90192663).

143985897 is a wasteful number, since it uses less digits than its factorization.

143985897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090 (or 3084 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 143985897 is about 11999.4123606117. The cubic root of 143985897 is about 524.1311670258.

The spelling of 143985897 in words is "one hundred forty-three million, nine hundred eighty-five thousand, eight hundred ninety-seven".