405936073 has 4 divisors (see below), whose sum is σ = 406958980. Its totient is φ = 404913168.

The previous prime is 405936071. The next prime is 405936077. The reversal of 405936073 is 370639504.

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 233722944 + 172213129 = 15288^2 + 13123^2 .

It is a cyclic number.

It is not a de Polignac number, because 405936073 - 2¹ = 405936071 is a prime.

It is a super-2 number, since 2×405936073² = 329568190725322658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405936071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510858 + ... + 511651.

It is an arithmetic number, because the mean of its divisors is an integer number (101739745).

Almost surely, 2^405936073 is an apocalyptic number.

It is an amenable number.

405936073 is a deficient number, since it is larger than the sum of its proper divisors (1022907).

405936073 is a wasteful number, since it uses less digits than its factorization.

405936073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022906.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 405936073 is about 20147.8552952914. The cubic root of 405936073 is about 740.4331971719.

The spelling of 405936073 in words is "four hundred five million, nine hundred thirty-six thousand, seventy-three".