405722969 has 4 divisors (see below), whose sum is σ = 429589044. Its totient is φ = 381856896.

The previous prime is 405722953. The next prime is 405722971. The reversal of 405722969 is 969227504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144480400 + 261242569 = 12020^2 + 16163^2 .

It is a cyclic number.

It is not a de Polignac number, because 405722969 - 2⁴ = 405722953 is a prime.

It is a super-2 number, since 2×405722969² = 329222255148349922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405722929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11933012 + ... + 11933045.

It is an arithmetic number, because the mean of its divisors is an integer number (107397261).

Almost surely, 2^405722969 is an apocalyptic number.

It is an amenable number.

405722969 is a deficient number, since it is larger than the sum of its proper divisors (23866075).

405722969 is a wasteful number, since it uses less digits than its factorization.

405722969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23866074.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 405722969 is about 20142.5660976947. The cubic root of 405722969 is about 740.3036062452.

The spelling of 405722969 in words is "four hundred five million, seven hundred twenty-two thousand, nine hundred sixty-nine".