997079143 has 2 divisors, whose sum is σ = 997079144. Its totient is φ = 997079142.

The previous prime is 997079119. The next prime is 997079191. The reversal of 997079143 is 341970799.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (341970799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997079143 - 2¹³ = 997070951 is a prime.

It is a super-2 number, since 2×997079143² = 1988333634811228898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997079543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498539571 + 498539572.

It is an arithmetic number, because the mean of its divisors is an integer number (498539572).

Almost surely, 2^997079143 is an apocalyptic number.

997079143 is a deficient number, since it is larger than the sum of its proper divisors (1).

997079143 is an equidigital number, since it uses as much as digits as its factorization.

997079143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 997079143 is about 31576.5600248032. The cubic root of 997079143 is about 999.0254315248.

The spelling of 997079143 in words is "nine hundred ninety-seven million, seventy-nine thousand, one hundred forty-three".