143193961 has 4 divisors (see below), whose sum is σ = 143722624. Its totient is φ = 142665300.

The previous prime is 143193949. The next prime is 143193979. The reversal of 143193961 is 169391341.

143193961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143193961 - 2¹¹ = 143191913 is a prime.

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 143193961.

It is not an unprimeable number, because it can be changed into a prime (143193931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263925 + ... + 264466.

It is an arithmetic number, because the mean of its divisors is an integer number (35930656).

Almost surely, 2^143193961 is an apocalyptic number.

It is an amenable number.

143193961 is a deficient number, since it is larger than the sum of its proper divisors (528663).

143193961 is an equidigital number, since it uses as much as digits as its factorization.

143193961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528662.

The product of its digits is 17496, while the sum is 37.

The square root of 143193961 is about 11966.3679117767. The cubic root of 143193961 is about 523.1684762984.

The spelling of 143193961 in words is "one hundred forty-three million, one hundred ninety-three thousand, nine hundred sixty-one".