320725019 has 2 divisors, whose sum is σ = 320725020. Its totient is φ = 320725018.

The previous prime is 320724973. The next prime is 320725061. The reversal of 320725019 is 910527023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320725019 - 2²⁴ = 303947803 is a prime.

It is a super-2 number, since 2×320725019² = 205729075625100722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320724982 and 320725000.

It is not a weakly prime, because it can be changed into another prime (320725319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160362509 + 160362510.

It is an arithmetic number, because the mean of its divisors is an integer number (160362510).

Almost surely, 2^320725019 is an apocalyptic number.

320725019 is a deficient number, since it is larger than the sum of its proper divisors (1).

320725019 is an equidigital number, since it uses as much as digits as its factorization.

320725019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 320725019 is about 17908.7972516303. The cubic root of 320725019 is about 684.5065578049.

The spelling of 320725019 in words is "three hundred twenty million, seven hundred twenty-five thousand, nineteen".