143712731 has 4 divisors (see below), whose sum is σ = 146148600. Its totient is φ = 141276864.

The previous prime is 143712727. The next prime is 143712761. The reversal of 143712731 is 137217341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 143712731 - 2² = 143712727 is a prime.

It is a super-2 number, since 2×143712731² = 41306698102956722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143712694 and 143712703.

It is not an unprimeable number, because it can be changed into a prime (143712761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217846 + ... + 1217963.

It is an arithmetic number, because the mean of its divisors is an integer number (36537150).

Almost surely, 2^143712731 is an apocalyptic number.

143712731 is a deficient number, since it is larger than the sum of its proper divisors (2435869).

143712731 is an equidigital number, since it uses as much as digits as its factorization.

143712731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435868.

The product of its digits is 3528, while the sum is 29.

The square root of 143712731 is about 11988.0244827911. The cubic root of 143712731 is about 523.7995015518.

The spelling of 143712731 in words is "one hundred forty-three million, seven hundred twelve thousand, seven hundred thirty-one".