809228630957 has 2 divisors, whose sum is σ = 809228630958. Its totient is φ = 809228630956.

The previous prime is 809228630893. The next prime is 809228630981. The reversal of 809228630957 is 759036822908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653843663236 + 155384967721 = 808606^2 + 394189^2 .

It is a cyclic number.

It is not a de Polignac number, because 809228630957 - 2⁶ = 809228630893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809228630896 and 809228630905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809228630557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404614315478 + 404614315479.

It is an arithmetic number, because the mean of its divisors is an integer number (404614315479).

Almost surely, 2^809228630957 is an apocalyptic number.

It is an amenable number.

809228630957 is a deficient number, since it is larger than the sum of its proper divisors (1).

809228630957 is an equidigital number, since it uses as much as digits as its factorization.

809228630957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 809228630957 in words is "eight hundred nine billion, two hundred twenty-eight million, six hundred thirty thousand, nine hundred fifty-seven".