471640387 has 2 divisors, whose sum is σ = 471640388. Its totient is φ = 471640386.

The previous prime is 471640313. The next prime is 471640409. The reversal of 471640387 is 783046174.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 471640387 - 2⁷ = 471640259 is a prime.

It is not a weakly prime, because it can be changed into another prime (471640087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235820193 + 235820194.

It is an arithmetic number, because the mean of its divisors is an integer number (235820194).

Almost surely, 2^471640387 is an apocalyptic number.

471640387 is a deficient number, since it is larger than the sum of its proper divisors (1).

471640387 is an equidigital number, since it uses as much as digits as its factorization.

471640387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 471640387 is about 21717.2831403930. The cubic root of 471640387 is about 778.4014967604.

The spelling of 471640387 in words is "four hundred seventy-one million, six hundred forty thousand, three hundred eighty-seven".