397199953 has 2 divisors, whose sum is σ = 397199954. Its totient is φ = 397199952.

The previous prime is 397199947. The next prime is 397200017. The reversal of 397199953 is 359991793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275825664 + 121374289 = 16608^2 + 11017^2 .

It is a cyclic number.

It is not a de Polignac number, because 397199953 - 2²¹ = 395102801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397199894 and 397199903.

It is not a weakly prime, because it can be changed into another prime (397199053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198599976 + 198599977.

It is an arithmetic number, because the mean of its divisors is an integer number (198599977).

Almost surely, 2^397199953 is an apocalyptic number.

It is an amenable number.

397199953 is a deficient number, since it is larger than the sum of its proper divisors (1).

397199953 is an equidigital number, since it uses as much as digits as its factorization.

397199953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2066715, while the sum is 55.

The square root of 397199953 is about 19929.8758902307. The cubic root of 397199953 is about 735.0830288606.

The spelling of 397199953 in words is "three hundred ninety-seven million, one hundred ninety-nine thousand, nine hundred fifty-three".