326623421 has 2 divisors, whose sum is σ = 326623422. Its totient is φ = 326623420.

The previous prime is 326623411. The next prime is 326623519. The reversal of 326623421 is 124326623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279357796 + 47265625 = 16714^2 + 6875^2 .

It is a cyclic number.

It is not a de Polignac number, because 326623421 - 2¹⁰ = 326622397 is a prime.

It is a Chen prime.

It is equal to p_17613308 and since 326623421 and 17613308 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326623411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163311710 + 163311711.

It is an arithmetic number, because the mean of its divisors is an integer number (163311711).

Almost surely, 2^326623421 is an apocalyptic number.

It is an amenable number.

326623421 is a deficient number, since it is larger than the sum of its proper divisors (1).

326623421 is an equidigital number, since it uses as much as digits as its factorization.

326623421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 326623421 is about 18072.7258873696. The cubic root of 326623421 is about 688.6773099703.

The spelling of 326623421 in words is "three hundred twenty-six million, six hundred twenty-three thousand, four hundred twenty-one".