397812385444723 has 2 divisors, whose sum is σ = 397812385444724. Its totient is φ = 397812385444722.

The previous prime is 397812385444703. The next prime is 397812385444787. The reversal of 397812385444723 is 327444583218793.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397812385444723 is a prime.

It is not a weakly prime, because it can be changed into another prime (397812385444703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198906192722361 + 198906192722362.

It is an arithmetic number, because the mean of its divisors is an integer number (198906192722362).

Almost surely, 2^{397812385444723} is an apocalyptic number.

397812385444723 is a deficient number, since it is larger than the sum of its proper divisors (1).

397812385444723 is an equidigital number, since it uses as much as digits as its factorization.

397812385444723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 975421440, while the sum is 70.

The spelling of 397812385444723 in words is "three hundred ninety-seven trillion, eight hundred twelve billion, three hundred eighty-five million, four hundred forty-four thousand, seven hundred twenty-three".