397229316823 has 2 divisors, whose sum is σ = 397229316824. Its totient is φ = 397229316822.

The previous prime is 397229316811. The next prime is 397229316829. The reversal of 397229316823 is 328613922793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397229316823 - 2¹³ = 397229308631 is a prime.

It is a super-2 number, since 2×397229316823² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397229316829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198614658411 + 198614658412.

It is an arithmetic number, because the mean of its divisors is an integer number (198614658412).

Almost surely, 2^397229316823 is an apocalyptic number.

397229316823 is a deficient number, since it is larger than the sum of its proper divisors (1).

397229316823 is an equidigital number, since it uses as much as digits as its factorization.

397229316823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 55.

The spelling of 397229316823 in words is "three hundred ninety-seven billion, two hundred twenty-nine million, three hundred sixteen thousand, eight hundred twenty-three".