393212345 has 16 divisors (see below), whose sum is σ = 484097040. Its totient is φ = 306432000.

The previous prime is 393212327. The next prime is 393212381. The reversal of 393212345 is 543212393.

It can be written as a sum of positive squares in 8 ways, for example, as 162537001 + 230675344 = 12749^2 + 15188^2 .

It is not a de Polignac number, because 393212345 - 2¹⁴ = 393195961 is a prime.

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, 205895 + ... + 207795.

It is an arithmetic number, because the mean of its divisors is an integer number (30256065).

Almost surely, 2^393212345 is an apocalyptic number.

It is an amenable number.

393212345 is a deficient number, since it is larger than the sum of its proper divisors (90884695).

393212345 is a wasteful number, since it uses less digits than its factorization.

393212345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its digits is 19440, while the sum is 32.

The square root of 393212345 is about 19829.5825725102. The cubic root of 393212345 is about 732.6148452995.

The spelling of 393212345 in words is "three hundred ninety-three million, two hundred twelve thousand, three hundred forty-five".