191996527 has 2 divisors, whose sum is σ = 191996528. Its totient is φ = 191996526.

The previous prime is 191996509. The next prime is 191996531. The reversal of 191996527 is 725699191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191996527 - 2¹¹ = 191994479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191996507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95998263 + 95998264.

It is an arithmetic number, because the mean of its divisors is an integer number (95998264).

Almost surely, 2^191996527 is an apocalyptic number.

191996527 is a deficient number, since it is larger than the sum of its proper divisors (1).

191996527 is an equidigital number, since it uses as much as digits as its factorization.

191996527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 49.

The square root of 191996527 is about 13856.2811388915. The cubic root of 191996527 is about 576.8963496765.

The spelling of 191996527 in words is "one hundred ninety-one million, nine hundred ninety-six thousand, five hundred twenty-seven".