393676609 has 4 divisors (see below), whose sum is σ = 397498816. Its totient is φ = 389854404.

The previous prime is 393676607. The next prime is 393676627. The reversal of 393676609 is 906676393.

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, and also an emirpimes, since its reverse is a distinct semiprime: 906676393 = 7 ⋅129525199.

It is a cyclic number.

It is not a de Polignac number, because 393676609 - 2¹ = 393676607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393676603) 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, 1910949 + ... + 1911154.

It is an arithmetic number, because the mean of its divisors is an integer number (99374704).

Almost surely, 2^393676609 is an apocalyptic number.

It is an amenable number.

393676609 is a deficient number, since it is larger than the sum of its proper divisors (3822207).

393676609 is a wasteful number, since it uses less digits than its factorization.

393676609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822206.

The product of its (nonzero) digits is 1102248, while the sum is 49.

The square root of 393676609 is about 19841.2854674288. The cubic root of 393676609 is about 732.9030635515.

The spelling of 393676609 in words is "three hundred ninety-three million, six hundred seventy-six thousand, six hundred nine".