191606479 has 2 divisors, whose sum is σ = 191606480. Its totient is φ = 191606478.

The previous prime is 191606447. The next prime is 191606483. The reversal of 191606479 is 974606191.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191606479 - 2⁵ = 191606447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191606879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95803239 + 95803240.

It is an arithmetic number, because the mean of its divisors is an integer number (95803240).

Almost surely, 2^191606479 is an apocalyptic number.

191606479 is a deficient number, since it is larger than the sum of its proper divisors (1).

191606479 is an equidigital number, since it uses as much as digits as its factorization.

191606479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 191606479 is about 13842.1992111080. The cubic root of 191606479 is about 576.5054227848.

The spelling of 191606479 in words is "one hundred ninety-one million, six hundred six thousand, four hundred seventy-nine".