405140479 has 2 divisors, whose sum is σ = 405140480. Its totient is φ = 405140478.

The previous prime is 405140471. The next prime is 405140537. The reversal of 405140479 is 974041504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405140479 - 2³ = 405140471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405140471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202570239 + 202570240.

It is an arithmetic number, because the mean of its divisors is an integer number (202570240).

Almost surely, 2^405140479 is an apocalyptic number.

405140479 is a deficient number, since it is larger than the sum of its proper divisors (1).

405140479 is an equidigital number, since it uses as much as digits as its factorization.

405140479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 405140479 is about 20128.1017237096. The cubic root of 405140479 is about 739.9491558687.

The spelling of 405140479 in words is "four hundred five million, one hundred forty thousand, four hundred seventy-nine".