143139893 has 8 divisors (see below), whose sum is σ = 155741208. Its totient is φ = 130765824.

The previous prime is 143139877. The next prime is 143139947. The reversal of 143139893 is 398931341.

It can be written as a sum of positive squares in 4 ways, for example, as 15382084 + 127757809 = 3922^2 + 11303^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 143139893 - 2⁴ = 143139877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 143139893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143139193) 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, 55496 + ... + 58017.

It is an arithmetic number, because the mean of its divisors is an integer number (19467651).

Almost surely, 2^143139893 is an apocalyptic number.

143139893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

143139893 is a deficient number, since it is larger than the sum of its proper divisors (12601315).

143139893 is a wasteful number, since it uses less digits than its factorization.

143139893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113623.

The product of its digits is 69984, while the sum is 41.

The square root of 143139893 is about 11964.1085334428. The cubic root of 143139893 is about 523.1026210209.

The spelling of 143139893 in words is "one hundred forty-three million, one hundred thirty-nine thousand, eight hundred ninety-three".