143814991 has 2 divisors, whose sum is σ = 143814992. Its totient is φ = 143814990.

The previous prime is 143814989. The next prime is 143815027. The reversal of 143814991 is 199418341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 143814991 - 2¹ = 143814989 is a prime.

Together with 143814989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143814901) 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, 71907495 + 71907496.

It is an arithmetic number, because the mean of its divisors is an integer number (71907496).

Almost surely, 2^143814991 is an apocalyptic number.

143814991 is a deficient number, since it is larger than the sum of its proper divisors (1).

143814991 is an equidigital number, since it uses as much as digits as its factorization.

143814991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 143814991 is about 11992.2888140671. The cubic root of 143814991 is about 523.9237100732.

The spelling of 143814991 in words is "one hundred forty-three million, eight hundred fourteen thousand, nine hundred ninety-one".