196518943 has 2 divisors, whose sum is σ = 196518944. Its totient is φ = 196518942.

The previous prime is 196518913. The next prime is 196518947. The reversal of 196518943 is 349815691.

It is a strong prime.

It is an emirp because it is prime and its reverse (349815691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196518943 - 2⁹ = 196518431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196518893 and 196518902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196518947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98259471 + 98259472.

It is an arithmetic number, because the mean of its divisors is an integer number (98259472).

Almost surely, 2^196518943 is an apocalyptic number.

196518943 is a deficient number, since it is larger than the sum of its proper divisors (1).

196518943 is an equidigital number, since it uses as much as digits as its factorization.

196518943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 196518943 is about 14018.5214270265. The cubic root of 196518943 is about 581.3907795126.

The spelling of 196518943 in words is "one hundred ninety-six million, five hundred eighteen thousand, nine hundred forty-three".