320425907 has 2 divisors, whose sum is σ = 320425908. Its totient is φ = 320425906.

The previous prime is 320425879. The next prime is 320425927. The reversal of 320425907 is 709524023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320425907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320425927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160212953 + 160212954.

It is an arithmetic number, because the mean of its divisors is an integer number (160212954).

Almost surely, 2^320425907 is an apocalyptic number.

320425907 is a deficient number, since it is larger than the sum of its proper divisors (1).

320425907 is an equidigital number, since it uses as much as digits as its factorization.

320425907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 320425907 is about 17900.4443240943. Note that the first 3 decimals coincide. The cubic root of 320425907 is about 684.2936986106.

The spelling of 320425907 in words is "three hundred twenty million, four hundred twenty-five thousand, nine hundred seven".