397848553 has 2 divisors, whose sum is σ = 397848554. Its totient is φ = 397848552.

The previous prime is 397848551. The next prime is 397848557. The reversal of 397848553 is 355848793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354644224 + 43204329 = 18832^2 + 6573^2 .

It is a cyclic number.

It is not a de Polignac number, because 397848553 - 2¹ = 397848551 is a prime.

It is a super-3 number, since 3×397848553³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 397848551, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 397848553.

It is not a weakly prime, because it can be changed into another prime (397848551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198924276 + 198924277.

It is an arithmetic number, because the mean of its divisors is an integer number (198924277).

Almost surely, 2^397848553 is an apocalyptic number.

It is an amenable number.

397848553 is a deficient number, since it is larger than the sum of its proper divisors (1).

397848553 is an equidigital number, since it uses as much as digits as its factorization.

397848553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 52.

The square root of 397848553 is about 19946.1413060271. The cubic root of 397848553 is about 735.4829244888.

The spelling of 397848553 in words is "three hundred ninety-seven million, eight hundred forty-eight thousand, five hundred fifty-three".