100423620197 has 4 divisors (see below), whose sum is σ = 100424289516. Its totient is φ = 100422950880.

The previous prime is 100423620151. The next prime is 100423620203. The reversal of 100423620197 is 791026324001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 25650905281 + 74772714916 = 160159^2 + 273446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100423620197 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 (100423620097) 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, 5963 + ... + 448199.

It is an arithmetic number, because the mean of its divisors is an integer number (25106072379).

Almost surely, 2^100423620197 is an apocalyptic number.

It is an amenable number.

100423620197 is a deficient number, since it is larger than the sum of its proper divisors (669319).

100423620197 is an equidigital number, since it uses as much as digits as its factorization.

100423620197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669318.

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 100423620197 its reverse (791026324001), we get a palindrome (891449944198).

The spelling of 100423620197 in words is "one hundred billion, four hundred twenty-three million, six hundred twenty thousand, one hundred ninety-seven".