320499671 has 2 divisors, whose sum is σ = 320499672. Its totient is φ = 320499670.

The previous prime is 320499653. The next prime is 320499689. The reversal of 320499671 is 176994023.

It is a balanced prime because it is at equal distance from previous prime (320499653) and next prime (320499689).

It is a cyclic number.

It is not a de Polignac number, because 320499671 - 2¹⁴ = 320483287 is a prime.

It is a super-2 number, since 2×320499671² = 205440078222216482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320499071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160249835 + 160249836.

It is an arithmetic number, because the mean of its divisors is an integer number (160249836).

Almost surely, 2^320499671 is an apocalyptic number.

320499671 is a deficient number, since it is larger than the sum of its proper divisors (1).

320499671 is an equidigital number, since it uses as much as digits as its factorization.

320499671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 320499671 is about 17902.5046013121. The cubic root of 320499671 is about 684.3462041108.

The spelling of 320499671 in words is "three hundred twenty million, four hundred ninety-nine thousand, six hundred seventy-one".