405404479 has 2 divisors, whose sum is σ = 405404480. Its totient is φ = 405404478.

The previous prime is 405404459. The next prime is 405404507. The reversal of 405404479 is 974404504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405404479 - 2¹³ = 405396287 is a prime.

It is a super-2 number, since 2×405404479² = 328705583186522882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405404429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202702239 + 202702240.

It is an arithmetic number, because the mean of its divisors is an integer number (202702240).

Almost surely, 2^405404479 is an apocalyptic number.

405404479 is a deficient number, since it is larger than the sum of its proper divisors (1).

405404479 is an equidigital number, since it uses as much as digits as its factorization.

405404479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 405404479 is about 20134.6586511915. The cubic root of 405404479 is about 740.1098442979.

The spelling of 405404479 in words is "four hundred five million, four hundred four thousand, four hundred seventy-nine".