143903213 has 2 divisors, whose sum is σ = 143903214. Its totient is φ = 143903212.

The previous prime is 143903189. The next prime is 143903233. The reversal of 143903213 is 312309341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126945289 + 16957924 = 11267^2 + 4118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143903213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143903233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71951606 + 71951607.

It is an arithmetic number, because the mean of its divisors is an integer number (71951607).

Almost surely, 2^143903213 is an apocalyptic number.

It is an amenable number.

143903213 is a deficient number, since it is larger than the sum of its proper divisors (1).

143903213 is an equidigital number, since it uses as much as digits as its factorization.

143903213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 143903213 is about 11995.9665304635. The cubic root of 143903213 is about 524.0308202547.

The spelling of 143903213 in words is "one hundred forty-three million, nine hundred three thousand, two hundred thirteen".