100020197 has 8 divisors (see below), whose sum is σ = 108487512. Its totient is φ = 91840000.

The previous prime is 100020191. The next prime is 100020233. The reversal of 100020197 is 791020001.

It can be written as a sum of positive squares in 4 ways, for example, as 196 + 100020001 = 14^2 + 10001^2 .

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

It is not a de Polignac number, because 100020197 - 2⁶ = 100020133 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 (100020191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71054 + ... + 72447.

It is an arithmetic number, because the mean of its divisors is an integer number (13560939).

Almost surely, 2^100020197 is an apocalyptic number.

100020197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

100020197 is a deficient number, since it is larger than the sum of its proper divisors (8467315).

100020197 is a wasteful number, since it uses less digits than its factorization.

100020197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143559.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 100020197 is about 10001.0097990153. The cubic root of 100020197 is about 464.1901299810.

Adding to 100020197 its reverse (791020001), we get a palindrome (891040198).

The spelling of 100020197 in words is "one hundred million, twenty thousand, one hundred ninety-seven".