320626667 has 2 divisors, whose sum is σ = 320626668. Its totient is φ = 320626666.

The previous prime is 320626597. The next prime is 320626679. The reversal of 320626667 is 766626023.

It is a strong prime.

It is an emirp because it is prime and its reverse (766626023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320626667 - 2¹⁸ = 320364523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320626667.

It is not a weakly prime, because it can be changed into another prime (320626687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160313333 + 160313334.

It is an arithmetic number, because the mean of its divisors is an integer number (160313334).

Almost surely, 2^320626667 is an apocalyptic number.

320626667 is a deficient number, since it is larger than the sum of its proper divisors (1).

320626667 is an equidigital number, since it uses as much as digits as its factorization.

320626667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 320626667 is about 17906.0511280405. The cubic root of 320626667 is about 684.4365814828.

The spelling of 320626667 in words is "three hundred twenty million, six hundred twenty-six thousand, six hundred sixty-seven".