397217341 has 2 divisors, whose sum is σ = 397217342. Its totient is φ = 397217340.

The previous prime is 397217269. The next prime is 397217357. The reversal of 397217341 is 143712793.

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., 288014841 + 109202500 = 16971^2 + 10450^2 .

It is a cyclic number.

It is not a de Polignac number, because 397217341 - 2⁷ = 397217213 is a prime.

It is a super-2 number, since 2×397217341² = 315563231982220562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397217341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397217371) 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, 198608670 + 198608671.

It is an arithmetic number, because the mean of its divisors is an integer number (198608671).

Almost surely, 2^397217341 is an apocalyptic number.

It is an amenable number.

397217341 is a deficient number, since it is larger than the sum of its proper divisors (1).

397217341 is an equidigital number, since it uses as much as digits as its factorization.

397217341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 397217341 is about 19930.3121149670. The cubic root of 397217341 is about 735.0937551435.

The spelling of 397217341 in words is "three hundred ninety-seven million, two hundred seventeen thousand, three hundred forty-one".