100690 has 8 divisors (see below), whose sum is σ = 181260. Its totient is φ = 40272.

The previous prime is 100673. The next prime is 100693. The reversal of 100690 is 96001.

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 3969 = 311^2 + 63^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×100690² = 20276952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025 + ... + 5044.

2¹⁰⁰⁶⁹⁰ is an apocalyptic number.

100690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100690 is a deficient number, since it is larger than the sum of its proper divisors (80570).

100690 is a wasteful number, since it uses less digits than its factorization.

100690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 100690 is about 317.3168763240. The cubic root of 100690 is about 46.5224002762.

Adding to 100690 its reverse (96001), we get a palindrome (196691).

The spelling of 100690 in words is "one hundred thousand, six hundred ninety".