405231469 has 2 divisors, whose sum is σ = 405231470. Its totient is φ = 405231468.

The previous prime is 405231467. The next prime is 405231517. The reversal of 405231469 is 964132504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379860100 + 25371369 = 19490^2 + 5037^2 .

It is a cyclic number.

It is not a de Polignac number, because 405231469 - 2¹ = 405231467 is a prime.

It is a super-2 number, since 2×405231469² = 328425086935795922, which contains 22 as substring.

Together with 405231467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405231467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202615734 + 202615735.

It is an arithmetic number, because the mean of its divisors is an integer number (202615735).

Almost surely, 2^405231469 is an apocalyptic number.

It is an amenable number.

405231469 is a deficient number, since it is larger than the sum of its proper divisors (1).

405231469 is an equidigital number, since it uses as much as digits as its factorization.

405231469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 405231469 is about 20130.3618695740. The cubic root of 405231469 is about 740.0045464780.

The spelling of 405231469 in words is "four hundred five million, two hundred thirty-one thousand, four hundred sixty-nine".