100988791 has 4 divisors (see below), whose sum is σ = 105379632. Its totient is φ = 96597952.

The previous prime is 100988777. The next prime is 100988801. The reversal of 100988791 is 197889001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100988791 - 2⁷ = 100988663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100988761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195386 + ... + 2195431.

It is an arithmetic number, because the mean of its divisors is an integer number (26344908).

Almost surely, 2^100988791 is an apocalyptic number.

100988791 is a deficient number, since it is larger than the sum of its proper divisors (4390841).

100988791 is an equidigital number, since it uses as much as digits as its factorization.

100988791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390840.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 100988791 is about 10049.3179370542. The cubic root of 100988791 is about 465.6837222818.

The spelling of 100988791 in words is "one hundred million, nine hundred eighty-eight thousand, seven hundred ninety-one".