909491018141 has 2 divisors, whose sum is σ = 909491018142. Its totient is φ = 909491018140.

The previous prime is 909491018083. The next prime is 909491018231. The reversal of 909491018141 is 141810194909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474095594116 + 435395424025 = 688546^2 + 659845^2 .

It is a cyclic number.

It is not a de Polignac number, because 909491018141 - 2⁶ = 909491018077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (909491012141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454745509070 + 454745509071.

It is an arithmetic number, because the mean of its divisors is an integer number (454745509071).

Almost surely, 2^909491018141 is an apocalyptic number.

It is an amenable number.

909491018141 is a deficient number, since it is larger than the sum of its proper divisors (1).

909491018141 is an equidigital number, since it uses as much as digits as its factorization.

909491018141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 909491018141 in words is "nine hundred nine billion, four hundred ninety-one million, eighteen thousand, one hundred forty-one".