195866623 has 2 divisors, whose sum is σ = 195866624. Its totient is φ = 195866622.

The previous prime is 195866617. The next prime is 195866663. The reversal of 195866623 is 326668591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195866623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195866663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97933311 + 97933312.

It is an arithmetic number, because the mean of its divisors is an integer number (97933312).

Almost surely, 2^195866623 is an apocalyptic number.

195866623 is a deficient number, since it is larger than the sum of its proper divisors (1).

195866623 is an equidigital number, since it uses as much as digits as its factorization.

195866623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 195866623 is about 13995.2357250602. The cubic root of 195866623 is about 580.7467818222.

The spelling of 195866623 in words is "one hundred ninety-five million, eight hundred sixty-six thousand, six hundred twenty-three".