326561401 has 4 divisors (see below), whose sum is σ = 332096400. Its totient is φ = 321026404.

The previous prime is 326561387. The next prime is 326561491. The reversal of 326561401 is 104165623.

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 326561401 - 2⁵ = 326561369 is a prime.

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 326561401.

It is not an unprimeable number, because it can be changed into a prime (326561491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2767411 + ... + 2767528.

It is an arithmetic number, because the mean of its divisors is an integer number (83024100).

Almost surely, 2^326561401 is an apocalyptic number.

It is an amenable number.

326561401 is a deficient number, since it is larger than the sum of its proper divisors (5534999).

326561401 is an equidigital number, since it uses as much as digits as its factorization.

326561401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5534998.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 326561401 is about 18071.0099607078. The cubic root of 326561401 is about 688.6337180051.

The spelling of 326561401 in words is "three hundred twenty-six million, five hundred sixty-one thousand, four hundred one".