396320091 has 4 divisors (see below), whose sum is σ = 528426792. Its totient is φ = 264213392.

The previous prime is 396320087. The next prime is 396320101. The reversal of 396320091 is 190023693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 396320091 - 2² = 396320087 is a prime.

It is a super-2 number, since 2×396320091² = 314139229060496562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (396320081) 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, 66053346 + ... + 66053351.

It is an arithmetic number, because the mean of its divisors is an integer number (132106698).

Almost surely, 2^396320091 is an apocalyptic number.

396320091 is a deficient number, since it is larger than the sum of its proper divisors (132106701).

396320091 is a wasteful number, since it uses less digits than its factorization.

396320091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132106700.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 396320091 is about 19907.7897065445. The cubic root of 396320091 is about 734.5398517399.

The spelling of 396320091 in words is "three hundred ninety-six million, three hundred twenty thousand, ninety-one".