143857749 has 8 divisors (see below), whose sum is σ = 219211840. Its totient is φ = 82204416.

The previous prime is 143857733. The next prime is 143857751. The reversal of 143857749 is 947758341.

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 143857749 - 2⁴ = 143857733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143857698 and 143857707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143857799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425164 + ... + 3425205.

It is an arithmetic number, because the mean of its divisors is an integer number (27401480).

Almost surely, 2^143857749 is an apocalyptic number.

It is an amenable number.

143857749 is a deficient number, since it is larger than the sum of its proper divisors (75354091).

143857749 is an equidigital number, since it uses as much as digits as its factorization.

143857749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6850379.

The product of its digits is 846720, while the sum is 48.

The square root of 143857749 is about 11994.0714104928. The cubic root of 143857749 is about 523.9756279576.

The spelling of 143857749 in words is "one hundred forty-three million, eight hundred fifty-seven thousand, seven hundred forty-nine".