191790463 has 2 divisors, whose sum is σ = 191790464. Its totient is φ = 191790462.

The previous prime is 191790457. The next prime is 191790509. The reversal of 191790463 is 364097191.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191790463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191796463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95895231 + 95895232.

It is an arithmetic number, because the mean of its divisors is an integer number (95895232).

Almost surely, 2^191790463 is an apocalyptic number.

191790463 is a deficient number, since it is larger than the sum of its proper divisors (1).

191790463 is an equidigital number, since it uses as much as digits as its factorization.

191790463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 191790463 is about 13848.8433813081. The cubic root of 191790463 is about 576.6898873933.

The spelling of 191790463 in words is "one hundred ninety-one million, seven hundred ninety thousand, four hundred sixty-three".