320493869 has 2 divisors, whose sum is σ = 320493870. Its totient is φ = 320493868.

The previous prime is 320493853. The next prime is 320493923. The reversal of 320493869 is 968394023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162690025 + 157803844 = 12755^2 + 12562^2 .

It is a cyclic number.

It is not a de Polignac number, because 320493869 - 2⁴ = 320493853 is a prime.

It is a super-2 number, since 2×320493869² = 205432640133178322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320493169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160246934 + 160246935.

It is an arithmetic number, because the mean of its divisors is an integer number (160246935).

Almost surely, 2^320493869 is an apocalyptic number.

It is an amenable number.

320493869 is a deficient number, since it is larger than the sum of its proper divisors (1).

320493869 is an equidigital number, since it uses as much as digits as its factorization.

320493869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 320493869 is about 17902.3425562131. The cubic root of 320493869 is about 684.3420745167.

The spelling of 320493869 in words is "three hundred twenty million, four hundred ninety-three thousand, eight hundred sixty-nine".