143139891 has 8 divisors (see below), whose sum is σ = 193152960. Its totient is φ = 94276712.

The previous prime is 143139877. The next prime is 143139947. The reversal of 143139891 is 198931341.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 143139891 - 2¹⁵ = 143107123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143139811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287181 + ... + 287678.

It is an arithmetic number, because the mean of its divisors is an integer number (24144120).

Almost surely, 2^143139891 is an apocalyptic number.

143139891 is a deficient number, since it is larger than the sum of its proper divisors (50013069).

143139891 is an equidigital number, since it uses as much as digits as its factorization.

143139891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574945.

The product of its digits is 23328, while the sum is 39.

The square root of 143139891 is about 11964.1084498595. The cubic root of 143139891 is about 523.1026185846.

The spelling of 143139891 in words is "one hundred forty-three million, one hundred thirty-nine thousand, eight hundred ninety-one".