100438925 has 6 divisors (see below), whose sum is σ = 124544298. Its totient is φ = 80351120.

The previous prime is 100438913. The next prime is 100438939. The reversal of 100438925 is 529834001.

It can be written as a sum of positive squares in 3 ways, for example, as 58564 + 100380361 = 242^2 + 10019^2 .

It is not a de Polignac number, because 100438925 - 2¹⁴ = 100422541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100438891 and 100438900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2008754 + ... + 2008803.

It is an arithmetic number, because the mean of its divisors is an integer number (20757383).

Almost surely, 2^100438925 is an apocalyptic number.

It is an amenable number.

100438925 is a deficient number, since it is larger than the sum of its proper divisors (24105373).

100438925 is an equidigital number, since it uses as much as digits as its factorization.

100438925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017567 (or 4017562 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 100438925 is about 10021.9222208117. The cubic root of 100438925 is about 464.8369953188.

The spelling of 100438925 in words is "one hundred million, four hundred thirty-eight thousand, nine hundred twenty-five".