320123137 has 2 divisors, whose sum is σ = 320123138. Its totient is φ = 320123136.

The previous prime is 320123129. The next prime is 320123159. The reversal of 320123137 is 731321023.

It is a happy number.

It is an a-pointer prime, because the next prime (320123159) can be obtained adding 320123137 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317944561 + 2178576 = 17831^2 + 1476^2 .

It is an emirp because it is prime and its reverse (731321023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320123137 - 2³ = 320123129 is a prime.

It is not a weakly prime, because it can be changed into another prime (320153137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061568 + 160061569.

It is an arithmetic number, because the mean of its divisors is an integer number (160061569).

Almost surely, 2^320123137 is an apocalyptic number.

It is an amenable number.

320123137 is a deficient number, since it is larger than the sum of its proper divisors (1).

320123137 is an equidigital number, since it uses as much as digits as its factorization.

320123137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 320123137 is about 17891.9852727415. The cubic root of 320123137 is about 684.0781012981.

The spelling of 320123137 in words is "three hundred twenty million, one hundred twenty-three thousand, one hundred thirty-seven".