195981463 has 2 divisors, whose sum is σ = 195981464. Its totient is φ = 195981462.

The previous prime is 195981451. The next prime is 195981479. The reversal of 195981463 is 364189591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195981463 - 2⁵ = 195981431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195901463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97990731 + 97990732.

It is an arithmetic number, because the mean of its divisors is an integer number (97990732).

Almost surely, 2^195981463 is an apocalyptic number.

195981463 is a deficient number, since it is larger than the sum of its proper divisors (1).

195981463 is an equidigital number, since it uses as much as digits as its factorization.

195981463 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 195981463 is about 13999.3379486317. The cubic root of 195981463 is about 580.8602602856.

The spelling of 195981463 in words is "one hundred ninety-five million, nine hundred eighty-one thousand, four hundred sixty-three".