326787161 has 2 divisors, whose sum is σ = 326787162. Its totient is φ = 326787160.

The previous prime is 326787133. The next prime is 326787199. The reversal of 326787161 is 161787623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217710025 + 109077136 = 14755^2 + 10444^2 .

It is a cyclic number.

It is not a de Polignac number, because 326787161 - 2¹⁰ = 326786137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (326787101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163393580 + 163393581.

It is an arithmetic number, because the mean of its divisors is an integer number (163393581).

Almost surely, 2^326787161 is an apocalyptic number.

It is an amenable number.

326787161 is a deficient number, since it is larger than the sum of its proper divisors (1).

326787161 is an equidigital number, since it uses as much as digits as its factorization.

326787161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 326787161 is about 18077.2553503014. The cubic root of 326787161 is about 688.7923713095.

The spelling of 326787161 in words is "three hundred twenty-six million, seven hundred eighty-seven thousand, one hundred sixty-one".