325737821 has 2 divisors, whose sum is σ = 325737822.
Its totient is φ = 325737820.
The previous prime is 325737649. The next prime is 325737977. The reversal of 325737821 is 128737523.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 258727225 + 67010596 = 16085^2 + 8186^2
It is a cyclic number.
It is not a de Polignac number, because 325737821 - 218 = 325475677 is a prime.
It is a super-2 number, since 2×3257378212 = 212210256059656082, which contains 22 as substring.
It is a Chen prime.
It is a lonely number, since its distance to closest prime (325737977) sets a new record.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (325737521) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162868910 + 162868911.
It is an arithmetic number, because the mean of its divisors is an integer number (162868911).
Almost surely, 2325737821 is an apocalyptic number.
It is an amenable number.
325737821 is a deficient number, since it is larger than the sum of its proper divisors (1).
325737821 is an equidigital number, since it uses as much as digits as its factorization.
325737821 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 70560, while the sum is 38.
The square root of 325737821 is about 18048.2082490202.
The cubic root of 325737821 is about 688.0543247678.
The spelling of 325737821 in words is "three hundred twenty-five million, seven hundred thirty-seven thousand, eight hundred twenty-one".