10091190509 has 2 divisors, whose sum is σ = 10091190510. Its totient is φ = 10091190508.

The previous prime is 10091190503. The next prime is 10091190517. The reversal of 10091190509 is 90509119001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8883628009 + 1207562500 = 94253^2 + 34750^2 .

It is a cyclic number.

It is not a de Polignac number, because 10091190509 - 2⁸ = 10091190253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10091190503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045595254 + 5045595255.

It is an arithmetic number, because the mean of its divisors is an integer number (5045595255).

Almost surely, 2^10091190509 is an apocalyptic number.

It is an amenable number.

10091190509 is a deficient number, since it is larger than the sum of its proper divisors (1).

10091190509 is an equidigital number, since it uses as much as digits as its factorization.

10091190509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 35.

The spelling of 10091190509 in words is "ten billion, ninety-one million, one hundred ninety thousand, five hundred nine".