397846849 has 2 divisors, whose sum is σ = 397846850. Its totient is φ = 397846848.

The previous prime is 397846843. The next prime is 397846907. The reversal of 397846849 is 948648793.

It is an a-pointer prime, because the next prime (397846907) can be obtained adding 397846849 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272250000 + 125596849 = 16500^2 + 11207^2 .

It is a cyclic number.

It is not a de Polignac number, because 397846849 - 2¹³ = 397838657 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 397846793 and 397846802.

It is not a weakly prime, because it can be changed into another prime (397846843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198923424 + 198923425.

It is an arithmetic number, because the mean of its divisors is an integer number (198923425).

Almost surely, 2^397846849 is an apocalyptic number.

It is an amenable number.

397846849 is a deficient number, since it is larger than the sum of its proper divisors (1).

397846849 is an equidigital number, since it uses as much as digits as its factorization.

397846849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 58.

The square root of 397846849 is about 19946.0985909526. The cubic root of 397846849 is about 735.4818744539.

The spelling of 397846849 in words is "three hundred ninety-seven million, eight hundred forty-six thousand, eight hundred forty-nine".