404305091 has 2 divisors, whose sum is σ = 404305092. Its totient is φ = 404305090.

The previous prime is 404305079. The next prime is 404305103. The reversal of 404305091 is 190503404.

It is a balanced prime because it is at equal distance from previous prime (404305079) and next prime (404305103).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404305091 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404305091.

It is not a weakly prime, because it can be changed into another prime (404301091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202152545 + 202152546.

It is an arithmetic number, because the mean of its divisors is an integer number (202152546).

Almost surely, 2^404305091 is an apocalyptic number.

404305091 is a deficient number, since it is larger than the sum of its proper divisors (1).

404305091 is an equidigital number, since it uses as much as digits as its factorization.

404305091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 404305091 is about 20107.3392322306. The cubic root of 404305091 is about 739.4402212890.

Adding to 404305091 its reverse (190503404), we get a palindrome (594808495).

The spelling of 404305091 in words is "four hundred four million, three hundred five thousand, ninety-one".