143842381 has 2 divisors, whose sum is σ = 143842382. Its totient is φ = 143842380.

The previous prime is 143842373. The next prime is 143842393. The reversal of 143842381 is 183248341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107433225 + 36409156 = 10365^2 + 6034^2 .

It is a cyclic number.

It is not a de Polignac number, because 143842381 - 2³ = 143842373 is a prime.

It is a super-2 number, since 2×143842381² = 41381261143498322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143842081) 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 as a sum of consecutive naturals, namely, 71921190 + 71921191.

It is an arithmetic number, because the mean of its divisors is an integer number (71921191).

Almost surely, 2^143842381 is an apocalyptic number.

It is an amenable number.

143842381 is a deficient number, since it is larger than the sum of its proper divisors (1).

143842381 is an equidigital number, since it uses as much as digits as its factorization.

143842381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 143842381 is about 11993.4307435362. The cubic root of 143842381 is about 523.9569689136.

The spelling of 143842381 in words is "one hundred forty-three million, eight hundred forty-two thousand, three hundred eighty-one".