404031101 has 2 divisors, whose sum is σ = 404031102. Its totient is φ = 404031100.

The previous prime is 404031079. The next prime is 404031113. The reversal of 404031101 is 101130404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248031001 + 156000100 = 15749^2 + 12490^2 .

It is a cyclic number.

It is not a de Polignac number, because 404031101 - 2¹⁴ = 404014717 is a prime.

It is a super-2 number, since 2×404031101² = 326482261150544402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404031151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202015550 + 202015551.

It is an arithmetic number, because the mean of its divisors is an integer number (202015551).

Almost surely, 2^404031101 is an apocalyptic number.

It is an amenable number.

404031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

404031101 is an equidigital number, since it uses as much as digits as its factorization.

404031101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 404031101 is about 20100.5248936439. The cubic root of 404031101 is about 739.2731486056.

Adding to 404031101 its reverse (101130404), we get a palindrome (505161505).

The spelling of 404031101 in words is "four hundred four million, thirty-one thousand, one hundred one".