320499061 has 2 divisors, whose sum is σ = 320499062. Its totient is φ = 320499060.

The previous prime is 320499059. The next prime is 320499071. The reversal of 320499061 is 160994023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179720836 + 140778225 = 13406^2 + 11865^2 .

It is an emirp because it is prime and its reverse (160994023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320499061 - 2¹ = 320499059 is a prime.

Together with 320499059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320499001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160249530 + 160249531.

It is an arithmetic number, because the mean of its divisors is an integer number (160249531).

Almost surely, 2^320499061 is an apocalyptic number.

It is an amenable number.

320499061 is a deficient number, since it is larger than the sum of its proper divisors (1).

320499061 is an equidigital number, since it uses as much as digits as its factorization.

320499061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 320499061 is about 17902.4875645816. The cubic root of 320499061 is about 684.3457699435.

The spelling of 320499061 in words is "three hundred twenty million, four hundred ninety-nine thousand, sixty-one".