100859491 has 2 divisors, whose sum is σ = 100859492. Its totient is φ = 100859490.

The previous prime is 100859489. The next prime is 100859527. The reversal of 100859491 is 194958001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100859491 - 2¹ = 100859489 is a prime.

Together with 100859489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 100859491.

It is not a weakly prime, because it can be changed into another prime (100859411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50429745 + 50429746.

It is an arithmetic number, because the mean of its divisors is an integer number (50429746).

Almost surely, 2^100859491 is an apocalyptic number.

100859491 is a deficient number, since it is larger than the sum of its proper divisors (1).

100859491 is an equidigital number, since it uses as much as digits as its factorization.

100859491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 100859491 is about 10042.8826041132. The cubic root of 100859491 is about 465.4848928848.

The spelling of 100859491 in words is "one hundred million, eight hundred fifty-nine thousand, four hundred ninety-one".