396521379 has 32 divisors (see below), whose sum is σ = 643464000. Its totient is φ = 240210432.

The previous prime is 396521371. The next prime is 396521387. The reversal of 396521379 is 973125693.

396521379 is a `hidden beast` number, since 3 + 96 + 521 + 37 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (396521371) and next prime (396521387).

It is not a de Polignac number, because 396521379 - 2³ = 396521371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396521371) 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 31 ways as a sum of consecutive naturals, for example, 1584 + ... + 28205.

It is an arithmetic number, because the mean of its divisors is an integer number (20108250).

Almost surely, 2^396521379 is an apocalyptic number.

396521379 is a deficient number, since it is larger than the sum of its proper divisors (246942621).

396521379 is a wasteful number, since it uses less digits than its factorization.

396521379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29844 (or 29838 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 396521379 is about 19912.8445732899. The cubic root of 396521379 is about 734.6641864522.

It can be divided in two parts, 396521 and 379, that added together give a square (396900 = 630²).

The spelling of 396521379 in words is "three hundred ninety-six million, five hundred twenty-one thousand, three hundred seventy-nine".