191470117 has 2 divisors, whose sum is σ = 191470118. Its totient is φ = 191470116.

The previous prime is 191470109. The next prime is 191470157. The reversal of 191470117 is 711074191.

191470117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163865601 + 27604516 = 12801^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 191470117 - 2³ = 191470109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191470157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95735058 + 95735059.

It is an arithmetic number, because the mean of its divisors is an integer number (95735059).

Almost surely, 2^191470117 is an apocalyptic number.

It is an amenable number.

191470117 is a deficient number, since it is larger than the sum of its proper divisors (1).

191470117 is an equidigital number, since it uses as much as digits as its factorization.

191470117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 31.

The square root of 191470117 is about 13837.2727442947. The cubic root of 191470117 is about 576.3686283691.

The spelling of 191470117 in words is "one hundred ninety-one million, four hundred seventy thousand, one hundred seventeen".