393872377 has 4 divisors (see below), whose sum is σ = 400548240. Its totient is φ = 387196516.

The previous prime is 393872359. The next prime is 393872383. The reversal of 393872377 is 773278393.

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 393872377 - 2¹¹ = 393870329 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 393872377.

It is not an unprimeable number, because it can be changed into a prime (393872357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3337843 + ... + 3337960.

It is an arithmetic number, because the mean of its divisors is an integer number (100137060).

Almost surely, 2^393872377 is an apocalyptic number.

It is an amenable number.

393872377 is a deficient number, since it is larger than the sum of its proper divisors (6675863).

393872377 is an equidigital number, since it uses as much as digits as its factorization.

393872377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675862.

The product of its digits is 1333584, while the sum is 49.

The square root of 393872377 is about 19846.2182039803. The cubic root of 393872377 is about 733.0245297390.

The spelling of 393872377 in words is "three hundred ninety-three million, eight hundred seventy-two thousand, three hundred seventy-seven".