397382761 has 2 divisors, whose sum is σ = 397382762. Its totient is φ = 397382760.

The previous prime is 397382729. The next prime is 397382771. The reversal of 397382761 is 167283793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331058025 + 66324736 = 18195^2 + 8144^2 .

It is an emirp because it is prime and its reverse (167283793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397382761 - 2⁵ = 397382729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397382771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198691380 + 198691381.

It is an arithmetic number, because the mean of its divisors is an integer number (198691381).

Almost surely, 2^397382761 is an apocalyptic number.

It is an amenable number.

397382761 is a deficient number, since it is larger than the sum of its proper divisors (1).

397382761 is an equidigital number, since it uses as much as digits as its factorization.

397382761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 397382761 is about 19934.4616430944. The cubic root of 397382761 is about 735.1957835298.

The spelling of 397382761 in words is "three hundred ninety-seven million, three hundred eighty-two thousand, seven hundred sixty-one".