396081811 has 4 divisors (see below), whose sum is σ = 396175824. Its totient is φ = 395987800.

The previous prime is 396081769. The next prime is 396081859. The reversal of 396081811 is 118180693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118180693 = 23 ⋅5138291.

It is a cyclic number.

It is not a de Polignac number, because 396081811 - 2¹⁷ = 395950739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396081871) 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, 40375 + ... + 49216.

It is an arithmetic number, because the mean of its divisors is an integer number (99043956).

Almost surely, 2^396081811 is an apocalyptic number.

396081811 is a deficient number, since it is larger than the sum of its proper divisors (94013).

396081811 is an equidigital number, since it uses as much as digits as its factorization.

396081811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94012.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 396081811 is about 19901.8042146937. The cubic root of 396081811 is about 734.3926128047.

The spelling of 396081811 in words is "three hundred ninety-six million, eighty-one thousand, eight hundred eleven".