100100401 has 2 divisors, whose sum is σ = 100100402. Its totient is φ = 100100400.

The previous prime is 100100389. The next prime is 100100423. The reversal of 100100401 is 104001001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97002801 + 3097600 = 9849^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 100100401 - 2⁹ = 100099889 is a prime.

It is not a weakly prime, because it can be changed into another prime (100100461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050200 + 50050201.

It is an arithmetic number, because the mean of its divisors is an integer number (50050201).

Almost surely, 2^100100401 is an apocalyptic number.

It is an amenable number.

100100401 is a deficient number, since it is larger than the sum of its proper divisors (1).

100100401 is an equidigital number, since it uses as much as digits as its factorization.

100100401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 100100401 is about 10005.0187905871. The cubic root of 100100401 is about 464.3141714561.

Adding to 100100401 its reverse (104001001), we get a palindrome (204101402).

The spelling of 100100401 in words is "one hundred million, one hundred thousand, four hundred one".