405927393 has 4 divisors (see below), whose sum is σ = 541236528. Its totient is φ = 270618260.

The previous prime is 405927349. The next prime is 405927427. The reversal of 405927393 is 393729504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405927393 - 2⁶ = 405927329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405920393) 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, 67654563 + ... + 67654568.

It is an arithmetic number, because the mean of its divisors is an integer number (135309132).

Almost surely, 2^405927393 is an apocalyptic number.

It is an amenable number.

405927393 is a deficient number, since it is larger than the sum of its proper divisors (135309135).

405927393 is a wasteful number, since it uses less digits than its factorization.

405927393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135309134.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 405927393 is about 20147.6398865971. The cubic root of 405927393 is about 740.4279196529.

The spelling of 405927393 in words is "four hundred five million, nine hundred twenty-seven thousand, three hundred ninety-three".