405636479 has 2 divisors, whose sum is σ = 405636480. Its totient is φ = 405636478.

The previous prime is 405636437. The next prime is 405636509. The reversal of 405636479 is 974636504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405636479 - 2⁸ = 405636223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405636379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202818239 + 202818240.

It is an arithmetic number, because the mean of its divisors is an integer number (202818240).

Almost surely, 2^405636479 is an apocalyptic number.

405636479 is a deficient number, since it is larger than the sum of its proper divisors (1).

405636479 is an equidigital number, since it uses as much as digits as its factorization.

405636479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 405636479 is about 20140.4190373488. The cubic root of 405636479 is about 740.2509977626.

The spelling of 405636479 in words is "four hundred five million, six hundred thirty-six thousand, four hundred seventy-nine".