191920067 has 2 divisors, whose sum is σ = 191920068. Its totient is φ = 191920066.

The previous prime is 191920061. The next prime is 191920087. The reversal of 191920067 is 760029191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191920067 - 2¹⁰ = 191919043 is a prime.

It is not a weakly prime, because it can be changed into another prime (191920061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95960033 + 95960034.

It is an arithmetic number, because the mean of its divisors is an integer number (95960034).

Almost surely, 2^191920067 is an apocalyptic number.

191920067 is a deficient number, since it is larger than the sum of its proper divisors (1).

191920067 is an equidigital number, since it uses as much as digits as its factorization.

191920067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 191920067 is about 13853.5218265970. The cubic root of 191920067 is about 576.8197591391.

The spelling of 191920067 in words is "one hundred ninety-one million, nine hundred twenty thousand, sixty-seven".