404361901 has 2 divisors, whose sum is σ = 404361902. Its totient is φ = 404361900.

The previous prime is 404361899. The next prime is 404361907. The reversal of 404361901 is 109163404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234059401 + 170302500 = 15299^2 + 13050^2 .

It is a cyclic number.

It is not a de Polignac number, because 404361901 - 2¹ = 404361899 is a prime.

Together with 404361899, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 404361901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404361907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202180950 + 202180951.

It is an arithmetic number, because the mean of its divisors is an integer number (202180951).

Almost surely, 2^404361901 is an apocalyptic number.

It is an amenable number.

404361901 is a deficient number, since it is larger than the sum of its proper divisors (1).

404361901 is an equidigital number, since it uses as much as digits as its factorization.

404361901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 404361901 is about 20108.7518508733. The cubic root of 404361901 is about 739.4748532476.

The spelling of 404361901 in words is "four hundred four million, three hundred sixty-one thousand, nine hundred one".