405431479 has 2 divisors, whose sum is σ = 405431480. Its totient is φ = 405431478.

The previous prime is 405431449. The next prime is 405431491. The reversal of 405431479 is 974134504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405431479 - 2⁹ = 405430967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405431449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202715739 + 202715740.

It is an arithmetic number, because the mean of its divisors is an integer number (202715740).

Almost surely, 2^405431479 is an apocalyptic number.

405431479 is a deficient number, since it is larger than the sum of its proper divisors (1).

405431479 is an equidigital number, since it uses as much as digits as its factorization.

405431479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 405431479 is about 20135.3291256935. The cubic root of 405431479 is about 740.1262744093.

The spelling of 405431479 in words is "four hundred five million, four hundred thirty-one thousand, four hundred seventy-nine".