143097749 has 8 divisors (see below), whose sum is σ = 147237720. Its totient is φ = 138988800.

The previous prime is 143097737. The next prime is 143097761. The reversal of 143097749 is 947790341.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (143097737) and next prime (143097761).

It can be written as a sum of positive squares in 4 ways, for example, as 36120100 + 106977649 = 6010^2 + 10343^2 .

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 143097749 - 2¹² = 143093653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143097769) 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, 1769 + ... + 17009.

It is an arithmetic number, because the mean of its divisors is an integer number (18404715).

Almost surely, 2^143097749 is an apocalyptic number.

It is an amenable number.

143097749 is a deficient number, since it is larger than the sum of its proper divisors (4139971).

143097749 is a wasteful number, since it uses less digits than its factorization.

143097749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15511.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 143097749 is about 11962.3471359094. The cubic root of 143097749 is about 523.0512777735.

The spelling of 143097749 in words is "one hundred forty-three million, ninety-seven thousand, seven hundred forty-nine".