100890917 has 4 divisors (see below), whose sum is σ = 100911660. Its totient is φ = 100870176.

The previous prime is 100890901. The next prime is 100890947. The reversal of 100890917 is 719098001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 719098001 = 191 ⋅3764911.

It can be written as a sum of positive squares in 2 ways, for example, as 31651876 + 69239041 = 5626^2 + 8321^2 .

It is a cyclic number.

It is not a de Polignac number, because 100890917 - 2⁴ = 100890901 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 (100890947) 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, 1313 + ... + 14265.

It is an arithmetic number, because the mean of its divisors is an integer number (25227915).

Almost surely, 2^100890917 is an apocalyptic number.

It is an amenable number.

100890917 is a deficient number, since it is larger than the sum of its proper divisors (20743).

100890917 is an equidigital number, since it uses as much as digits as its factorization.

100890917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20742.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 100890917 is about 10044.4470728856. The cubic root of 100890917 is about 465.5332334328.

The spelling of 100890917 in words is "one hundred million, eight hundred ninety thousand, nine hundred seventeen".