993864405 has 16 divisors (see below), whose sum is σ = 1590914304. Its totient is φ = 529817280.

The previous prime is 993864373. The next prime is 993864449. The reversal of 993864405 is 504468399.

It is not a de Polignac number, because 993864405 - 2⁵ = 993864373 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21300 + ... + 49410.

It is an arithmetic number, because the mean of its divisors is an integer number (99432144).

Almost surely, 2^993864405 is an apocalyptic number.

It is an amenable number.

993864405 is a deficient number, since it is larger than the sum of its proper divisors (597049899).

993864405 is a wasteful number, since it uses less digits than its factorization.

993864405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30476.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 993864405 is about 31525.6150614068. The cubic root of 993864405 is about 997.9506045140.

The spelling of 993864405 in words is "nine hundred ninety-three million, eight hundred sixty-four thousand, four hundred five".