143897447 has 2 divisors, whose sum is σ = 143897448. Its totient is φ = 143897446.

The previous prime is 143897437. The next prime is 143897471. The reversal of 143897447 is 744798341.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143897447 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143897437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71948723 + 71948724.

It is an arithmetic number, because the mean of its divisors is an integer number (71948724).

Almost surely, 2^143897447 is an apocalyptic number.

143897447 is a deficient number, since it is larger than the sum of its proper divisors (1).

143897447 is an equidigital number, since it uses as much as digits as its factorization.

143897447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 143897447 is about 11995.7261972754. The cubic root of 143897447 is about 524.0238211011.

The spelling of 143897447 in words is "one hundred forty-three million, eight hundred ninety-seven thousand, four hundred forty-seven".