100397 has 4 divisors (see below), whose sum is σ = 109536. Its totient is φ = 91260.

The previous prime is 100393. The next prime is 100403. The reversal of 100397 is 793001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793001 = 11 ⋅72091.

It is a cyclic number.

It is not a de Polignac number, because 100397 - 2² = 100393 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 (100391) 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, 4553 + ... + 4574.

It is an arithmetic number, because the mean of its divisors is an integer number (27384).

2¹⁰⁰³⁹⁷ is an apocalyptic number.

It is an amenable number.

100397 is a deficient number, since it is larger than the sum of its proper divisors (9139).

100397 is an equidigital number, since it uses as much as digits as its factorization.

100397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 100397 is about 316.8548563617. The cubic root of 100397 is about 46.4772309231.

Adding to 100397 its reverse (793001), we get a palindrome (893398).

The spelling of 100397 in words is "one hundred thousand, three hundred ninety-seven".