326723161 has 4 divisors (see below), whose sum is σ = 328271824. Its totient is φ = 325174500.

The previous prime is 326723141. The next prime is 326723203. The reversal of 326723161 is 161327623.

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, and also an emirpimes, since its reverse is a distinct semiprime: 161327623 = 1783 ⋅90481.

It is a cyclic number.

It is not a de Polignac number, because 326723161 - 2²¹ = 324626009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326723101) 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, 774015 + ... + 774436.

It is an arithmetic number, because the mean of its divisors is an integer number (82067956).

Almost surely, 2^326723161 is an apocalyptic number.

It is an amenable number.

326723161 is a deficient number, since it is larger than the sum of its proper divisors (1548663).

326723161 is a wasteful number, since it uses less digits than its factorization.

326723161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548662.

The product of its digits is 9072, while the sum is 31.

The square root of 326723161 is about 18075.4850833940. The cubic root of 326723161 is about 688.7474026009.

The spelling of 326723161 in words is "three hundred twenty-six million, seven hundred twenty-three thousand, one hundred sixty-one".