909131128057 has 2 divisors, whose sum is σ = 909131128058. Its totient is φ = 909131128056.

The previous prime is 909131128021. The next prime is 909131128091. The reversal of 909131128057 is 750821131909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885285282816 + 23845845241 = 940896^2 + 154421^2 .

It is a cyclic number.

It is not a de Polignac number, because 909131128057 - 2¹⁵ = 909131095289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 909131127998 and 909131128016.

It is not a weakly prime, because it can be changed into another prime (909131128457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454565564028 + 454565564029.

It is an arithmetic number, because the mean of its divisors is an integer number (454565564029).

Almost surely, 2^909131128057 is an apocalyptic number.

It is an amenable number.

909131128057 is a deficient number, since it is larger than the sum of its proper divisors (1).

909131128057 is an equidigital number, since it uses as much as digits as its factorization.

909131128057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 909131128057 in words is "nine hundred nine billion, one hundred thirty-one million, one hundred twenty-eight thousand, fifty-seven".