320742897547 has 2 divisors, whose sum is σ = 320742897548. Its totient is φ = 320742897546.

The previous prime is 320742897479. The next prime is 320742897571. The reversal of 320742897547 is 745798247023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320742897547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320742897491 and 320742897500.

It is not a weakly prime, because it can be changed into another prime (320742897047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160371448773 + 160371448774.

It is an arithmetic number, because the mean of its divisors is an integer number (160371448774).

Almost surely, 2^320742897547 is an apocalyptic number.

320742897547 is a deficient number, since it is larger than the sum of its proper divisors (1).

320742897547 is an equidigital number, since it uses as much as digits as its factorization.

320742897547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23708160, while the sum is 58.

The spelling of 320742897547 in words is "three hundred twenty billion, seven hundred forty-two million, eight hundred ninety-seven thousand, five hundred forty-seven".