325477781 has 2 divisors, whose sum is σ = 325477782. Its totient is φ = 325477780.

The previous prime is 325477769. The next prime is 325477783. The reversal of 325477781 is 187774523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325477681 + 100 = 18041^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 325477781 - 2¹⁴ = 325461397 is a prime.

It is a super-2 number, since 2×325477781² = 211871571849367922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 325477783, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325477783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162738890 + 162738891.

It is an arithmetic number, because the mean of its divisors is an integer number (162738891).

Almost surely, 2^325477781 is an apocalyptic number.

It is an amenable number.

325477781 is a deficient number, since it is larger than the sum of its proper divisors (1).

325477781 is an equidigital number, since it uses as much as digits as its factorization.

325477781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 44.

The square root of 325477781 is about 18041.0027714648. The cubic root of 325477781 is about 687.8711823058.

The spelling of 325477781 in words is "three hundred twenty-five million, four hundred seventy-seven thousand, seven hundred eighty-one".