404665031 has 2 divisors, whose sum is σ = 404665032. Its totient is φ = 404665030.

The previous prime is 404664973. The next prime is 404665049. The reversal of 404665031 is 130566404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404665031 is a prime.

It is a super-2 number, since 2×404665031² = 327507574628461922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 404664985 and 404665003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404665081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202332515 + 202332516.

It is an arithmetic number, because the mean of its divisors is an integer number (202332516).

Almost surely, 2^404665031 is an apocalyptic number.

404665031 is a deficient number, since it is larger than the sum of its proper divisors (1).

404665031 is an equidigital number, since it uses as much as digits as its factorization.

404665031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 404665031 is about 20116.2877042460. The cubic root of 404665031 is about 739.6595895955.

The spelling of 404665031 in words is "four hundred four million, six hundred sixty-five thousand, thirty-one".