100689091 has 2 divisors, whose sum is σ = 100689092. Its totient is φ = 100689090.

The previous prime is 100689067. The next prime is 100689097. The reversal of 100689091 is 190986001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100689091 - 2⁵ = 100689059 is a prime.

It is not a weakly prime, because it can be changed into another prime (100689097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50344545 + 50344546.

It is an arithmetic number, because the mean of its divisors is an integer number (50344546).

Almost surely, 2^100689091 is an apocalyptic number.

100689091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100689091 is an equidigital number, since it uses as much as digits as its factorization.

100689091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 100689091 is about 10034.3953978304. The cubic root of 100689091 is about 465.2226027886. Note that the first 3 decimals are identical.

The spelling of 100689091 in words is "one hundred million, six hundred eighty-nine thousand, ninety-one".