327690421 has 2 divisors, whose sum is σ = 327690422. Its totient is φ = 327690420.

The previous prime is 327690413. The next prime is 327690427. The reversal of 327690421 is 124096723.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324504196 + 3186225 = 18014^2 + 1785^2 .

It is an emirp because it is prime and its reverse (124096723) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 327690421 - 2³ = 327690413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (327690427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163845210 + 163845211.

It is an arithmetic number, because the mean of its divisors is an integer number (163845211).

Almost surely, 2^327690421 is an apocalyptic number.

It is an amenable number.

327690421 is a deficient number, since it is larger than the sum of its proper divisors (1).

327690421 is an equidigital number, since it uses as much as digits as its factorization.

327690421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 327690421 is about 18102.2214382655. The cubic root of 327690421 is about 689.4264091194.

The spelling of 327690421 in words is "three hundred twenty-seven million, six hundred ninety thousand, four hundred twenty-one".