397043663 has 2 divisors, whose sum is σ = 397043664. Its totient is φ = 397043662.

The previous prime is 397043593. The next prime is 397043671. The reversal of 397043663 is 366340793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397043663 - 2¹² = 397039567 is a prime.

It is equal to p_21186869 and since 397043663 and 21186869 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397043663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397043683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198521831 + 198521832.

It is an arithmetic number, because the mean of its divisors is an integer number (198521832).

Almost surely, 2^397043663 is an apocalyptic number.

397043663 is a deficient number, since it is larger than the sum of its proper divisors (1).

397043663 is an equidigital number, since it uses as much as digits as its factorization.

397043663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 41.

The square root of 397043663 is about 19925.9545066228. The cubic root of 397043663 is about 734.9866028687.

The spelling of 397043663 in words is "three hundred ninety-seven million, forty-three thousand, six hundred sixty-three".