143047981 has 8 divisors (see below), whose sum is σ = 152755200. Its totient is φ = 133659120.

The previous prime is 143047973. The next prime is 143048023. The reversal of 143047981 is 189740341.

143047981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 143047981 - 2³ = 143047973 is a prime.

It is a super-2 number, since 2×143047981² = 40925449736352722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143047981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143047921) 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, 78661 + ... + 80458.

It is an arithmetic number, because the mean of its divisors is an integer number (19094400).

Almost surely, 2^143047981 is an apocalyptic number.

It is an amenable number.

143047981 is a deficient number, since it is larger than the sum of its proper divisors (9707219).

143047981 is a wasteful number, since it uses less digits than its factorization.

143047981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159179.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 143047981 is about 11960.2667612391. The cubic root of 143047981 is about 522.9906333665.

The spelling of 143047981 in words is "one hundred forty-three million, forty-seven thousand, nine hundred eighty-one".