325537661 has 2 divisors, whose sum is σ = 325537662. Its totient is φ = 325537660.

The previous prime is 325537643. The next prime is 325537669. The reversal of 325537661 is 166735523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253796761 + 71740900 = 15931^2 + 8470^2 .

It is an emirp because it is prime and its reverse (166735523) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 325537661 - 2¹⁰ = 325536637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325537669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162768830 + 162768831.

It is an arithmetic number, because the mean of its divisors is an integer number (162768831).

Almost surely, 2^325537661 is an apocalyptic number.

It is an amenable number.

325537661 is a deficient number, since it is larger than the sum of its proper divisors (1).

325537661 is an equidigital number, since it uses as much as digits as its factorization.

325537661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 38.

The square root of 325537661 is about 18042.6622481274. The cubic root of 325537661 is about 687.9133635781.

The spelling of 325537661 in words is "three hundred twenty-five million, five hundred thirty-seven thousand, six hundred sixty-one".