100438997 has 4 divisors (see below), whose sum is σ = 105725280. Its totient is φ = 95152716.

The previous prime is 100438991. The next prime is 100439011. The reversal of 100438997 is 799834001.

It is a happy number.

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: 799834001 = 113 ⋅7078177.

It is a cyclic number.

It is not a de Polignac number, because 100438997 - 2⁴ = 100438981 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 (100438991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2643113 + ... + 2643150.

It is an arithmetic number, because the mean of its divisors is an integer number (26431320).

Almost surely, 2^100438997 is an apocalyptic number.

It is an amenable number.

100438997 is a deficient number, since it is larger than the sum of its proper divisors (5286283).

100438997 is an equidigital number, since it uses as much as digits as its factorization.

100438997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286282.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 100438997 is about 10021.9258129364. The cubic root of 100438997 is about 464.8371063922.

The spelling of 100438997 in words is "one hundred million, four hundred thirty-eight thousand, nine hundred ninety-seven".