320493847 has 2 divisors, whose sum is σ = 320493848. Its totient is φ = 320493846.

The previous prime is 320493791. The next prime is 320493853. The reversal of 320493847 is 748394023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320493847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320493347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160246923 + 160246924.

It is an arithmetic number, because the mean of its divisors is an integer number (160246924).

Almost surely, 2^320493847 is an apocalyptic number.

320493847 is a deficient number, since it is larger than the sum of its proper divisors (1).

320493847 is an equidigital number, since it uses as much as digits as its factorization.

320493847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 320493847 is about 17902.3419417684. The cubic root of 320493847 is about 684.3420588580.

The spelling of 320493847 in words is "three hundred twenty million, four hundred ninety-three thousand, eight hundred forty-seven".