143491113 has 12 divisors (see below), whose sum is σ = 207511668. Its totient is φ = 95546880.

The previous prime is 143491109. The next prime is 143491123. The reversal of 143491113 is 311194341.

It can be written as a sum of positive squares in 2 ways, for example, as 21874329 + 121616784 = 4677^2 + 11028^2 .

It is not a de Polignac number, because 143491113 - 2² = 143491109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143491123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1120 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (17292639).

Almost surely, 2^143491113 is an apocalyptic number.

It is an amenable number.

143491113 is a deficient number, since it is larger than the sum of its proper divisors (64020555).

143491113 is a wasteful number, since it uses less digits than its factorization.

143491113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18984 (or 18981 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 143491113 is about 11978.7776087546. Note that the first 3 decimals coincide. The cubic root of 143491113 is about 523.5301143313.

The spelling of 143491113 in words is "one hundred forty-three million, four hundred ninety-one thousand, one hundred thirteen".