397266547 has 2 divisors, whose sum is σ = 397266548. Its totient is φ = 397266546.

The previous prime is 397266509. The next prime is 397266559. The reversal of 397266547 is 745662793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397266547 - 2¹¹ = 397264499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397266547.

It is not a weakly prime, because it can be changed into another prime (397266847) 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, 198633273 + 198633274.

It is an arithmetic number, because the mean of its divisors is an integer number (198633274).

Almost surely, 2^397266547 is an apocalyptic number.

397266547 is a deficient number, since it is larger than the sum of its proper divisors (1).

397266547 is an equidigital number, since it uses as much as digits as its factorization.

397266547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 49.

The square root of 397266547 is about 19931.5465280545. The cubic root of 397266547 is about 735.1241075695.

The spelling of 397266547 in words is "three hundred ninety-seven million, two hundred sixty-six thousand, five hundred forty-seven".