471640409 has 2 divisors, whose sum is σ = 471640410. Its totient is φ = 471640408.

The previous prime is 471640387. The next prime is 471640457. The reversal of 471640409 is 904046174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405136384 + 66504025 = 20128^2 + 8155^2 .

It is a cyclic number.

It is not a de Polignac number, because 471640409 - 2²⁰ = 470591833 is a prime.

It is not a weakly prime, because it can be changed into another prime (471640709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235820204 + 235820205.

It is an arithmetic number, because the mean of its divisors is an integer number (235820205).

Almost surely, 2^471640409 is an apocalyptic number.

It is an amenable number.

471640409 is a deficient number, since it is larger than the sum of its proper divisors (1).

471640409 is an equidigital number, since it uses as much as digits as its factorization.

471640409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 471640409 is about 21717.2836469021. The cubic root of 471640409 is about 778.4015088634.

The spelling of 471640409 in words is "four hundred seventy-one million, six hundred forty thousand, four hundred nine".