475721117 has 2 divisors, whose sum is σ = 475721118. Its totient is φ = 475721116.

The previous prime is 475721101. The next prime is 475721119. The reversal of 475721117 is 711127574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306565081 + 169156036 = 17509^2 + 13006^2 .

It is a cyclic number.

It is not a de Polignac number, because 475721117 - 2⁴ = 475721101 is a prime.

Together with 475721119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475721119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237860558 + 237860559.

It is an arithmetic number, because the mean of its divisors is an integer number (237860559).

Almost surely, 2^475721117 is an apocalyptic number.

It is an amenable number.

475721117 is a deficient number, since it is larger than the sum of its proper divisors (1).

475721117 is an equidigital number, since it uses as much as digits as its factorization.

475721117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13720, while the sum is 35.

The square root of 475721117 is about 21811.0320021772. The cubic root of 475721117 is about 780.6400165594.

The spelling of 475721117 in words is "four hundred seventy-five million, seven hundred twenty-one thousand, one hundred seventeen".