100005091 has 2 divisors, whose sum is σ = 100005092. Its totient is φ = 100005090.

The previous prime is 100005083. The next prime is 100005097. The reversal of 100005091 is 190500001.

It is a strong prime.

It is an emirp because it is prime and its reverse (190500001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100005091 - 2³ = 100005083 is a prime.

It is not a weakly prime, because it can be changed into another prime (100005097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50002545 + 50002546.

It is an arithmetic number, because the mean of its divisors is an integer number (50002546).

Almost surely, 2^100005091 is an apocalyptic number.

100005091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100005091 is an equidigital number, since it uses as much as digits as its factorization.

100005091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 100005091 is about 10000.2545467603. The cubic root of 100005091 is about 464.1667600039.

Adding to 100005091 its reverse (190500001), we get a palindrome (290505092).

The spelling of 100005091 in words is "one hundred million, five thousand, ninety-one".