324991001 has 2 divisors, whose sum is σ = 324991002. Its totient is φ = 324991000.

The previous prime is 324990997. The next prime is 324991003. The reversal of 324991001 is 100199423.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194574601 + 130416400 = 13949^2 + 11420^2 .

It is an emirp because it is prime and its reverse (100199423) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 324991001 - 2² = 324990997 is a prime.

Together with 324991003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (324991003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162495500 + 162495501.

It is an arithmetic number, because the mean of its divisors is an integer number (162495501).

Almost surely, 2^324991001 is an apocalyptic number.

It is an amenable number.

324991001 is a deficient number, since it is larger than the sum of its proper divisors (1).

324991001 is an equidigital number, since it uses as much as digits as its factorization.

324991001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 324991001 is about 18027.5067882389. The cubic root of 324991001 is about 687.5280877120.

The spelling of 324991001 in words is "three hundred twenty-four million, nine hundred ninety-one thousand, one".