191099220607 has 2 divisors, whose sum is σ = 191099220608. Its totient is φ = 191099220606.

The previous prime is 191099220601. The next prime is 191099220677. The reversal of 191099220607 is 706022990191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191099220607 - 2¹⁹ = 191098696319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191099220601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95549610303 + 95549610304.

It is an arithmetic number, because the mean of its divisors is an integer number (95549610304).

Almost surely, 2^191099220607 is an apocalyptic number.

191099220607 is a deficient number, since it is larger than the sum of its proper divisors (1).

191099220607 is an equidigital number, since it uses as much as digits as its factorization.

191099220607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 191099220607 in words is "one hundred ninety-one billion, ninety-nine million, two hundred twenty thousand, six hundred seven".