191270969 has 2 divisors, whose sum is σ = 191270970. Its totient is φ = 191270968.

The previous prime is 191270917. The next prime is 191270977. The reversal of 191270969 is 969072191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103286569 + 87984400 = 10163^2 + 9380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191270969 is a prime.

It is a super-2 number, since 2×191270969² = 73169167164397922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191270999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95635484 + 95635485.

It is an arithmetic number, because the mean of its divisors is an integer number (95635485).

Almost surely, 2^191270969 is an apocalyptic number.

It is an amenable number.

191270969 is a deficient number, since it is larger than the sum of its proper divisors (1).

191270969 is an equidigital number, since it uses as much as digits as its factorization.

191270969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 191270969 is about 13830.0748009546. The cubic root of 191270969 is about 576.1687321146.

The spelling of 191270969 in words is "one hundred ninety-one million, two hundred seventy thousand, nine hundred sixty-nine".