997350143 has 2 divisors, whose sum is σ = 997350144. Its totient is φ = 997350142.

The previous prime is 997350139. The next prime is 997350157. The reversal of 997350143 is 341053799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997350143 - 2² = 997350139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997350143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997350113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498675071 + 498675072.

It is an arithmetic number, because the mean of its divisors is an integer number (498675072).

Almost surely, 2^997350143 is an apocalyptic number.

997350143 is a deficient number, since it is larger than the sum of its proper divisors (1).

997350143 is an equidigital number, since it uses as much as digits as its factorization.

997350143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 997350143 is about 31580.8508910067. The cubic root of 997350143 is about 999.1159329892.

The spelling of 997350143 in words is "nine hundred ninety-seven million, three hundred fifty thousand, one hundred forty-three".