472216691 has 2 divisors, whose sum is σ = 472216692. Its totient is φ = 472216690.

The previous prime is 472216637. The next prime is 472216699. The reversal of 472216691 is 196612274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 472216691 - 2²⁶ = 405107827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (472216699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236108345 + 236108346.

It is an arithmetic number, because the mean of its divisors is an integer number (236108346).

Almost surely, 2^472216691 is an apocalyptic number.

472216691 is a deficient number, since it is larger than the sum of its proper divisors (1).

472216691 is an equidigital number, since it uses as much as digits as its factorization.

472216691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 472216691 is about 21730.5474160225. The cubic root of 472216691 is about 778.7184142801.

The spelling of 472216691 in words is "four hundred seventy-two million, two hundred sixteen thousand, six hundred ninety-one".