393745473 has 24 divisors (see below), whose sum is σ = 621079680. Its totient is φ = 238390560.

The previous prime is 393745447. The next prime is 393745489. The reversal of 393745473 is 374547393.

It is a happy number.

393745473 is a `hidden beast` number, since 39 + 3 + 74 + 547 + 3 = 666.

It is not a de Polignac number, because 393745473 - 2¹² = 393741377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (393745433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164040 + ... + 166422.

It is an arithmetic number, because the mean of its divisors is an integer number (25878320).

Almost surely, 2^393745473 is an apocalyptic number.

393745473 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

393745473 is a deficient number, since it is larger than the sum of its proper divisors (227334207).

393745473 is a wasteful number, since it uses less digits than its factorization.

393745473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 4066 counting only the distinct ones).

The product of its digits is 952560, while the sum is 45.

The square root of 393745473 is about 19843.0207629786. The cubic root of 393745473 is about 732.9457954901.

The spelling of 393745473 in words is "three hundred ninety-three million, seven hundred forty-five thousand, four hundred seventy-three".