100440401 has 2 divisors, whose sum is σ = 100440402. Its totient is φ = 100440400.

The previous prime is 100440391. The next prime is 100440407. The reversal of 100440401 is 104044001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58125376 + 42315025 = 7624^2 + 6505^2 .

It is a cyclic number.

It is not a de Polignac number, because 100440401 - 2⁶ = 100440337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (100440407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50220200 + 50220201.

It is an arithmetic number, because the mean of its divisors is an integer number (50220201).

Almost surely, 2^100440401 is an apocalyptic number.

It is an amenable number.

100440401 is a deficient number, since it is larger than the sum of its proper divisors (1).

100440401 is an equidigital number, since it uses as much as digits as its factorization.

100440401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 100440401 is about 10021.9958591091. The cubic root of 100440401 is about 464.8392723114.

Adding to 100440401 its reverse (104044001), we get a palindrome (204484402).

The spelling of 100440401 in words is "one hundred million, four hundred forty thousand, four hundred one".