405213873 has 4 divisors (see below), whose sum is σ = 540285168. Its totient is φ = 270142580.

The previous prime is 405213871. The next prime is 405213881. The reversal of 405213873 is 378312504.

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 405213873 - 2¹ = 405213871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405213871) 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, 67535643 + ... + 67535648.

It is an arithmetic number, because the mean of its divisors is an integer number (135071292).

Almost surely, 2^405213873 is an apocalyptic number.

It is an amenable number.

405213873 is a deficient number, since it is larger than the sum of its proper divisors (135071295).

405213873 is a wasteful number, since it uses less digits than its factorization.

405213873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135071294.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 405213873 is about 20129.9248135705. The cubic root of 405213873 is about 739.9938354734.

The spelling of 405213873 in words is "four hundred five million, two hundred thirteen thousand, eight hundred seventy-three".