397353663 has 24 divisors (see below), whose sum is σ = 661127168. Its totient is φ = 225266832.

The previous prime is 397353637. The next prime is 397353683. The reversal of 397353663 is 366353793.

It is a happy number.

It is not a de Polignac number, because 397353663 - 2⁶ = 397353599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397353623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16831 + ... + 32832.

Almost surely, 2^397353663 is an apocalyptic number.

397353663 is a deficient number, since it is larger than the sum of its proper divisors (263773505).

397353663 is a wasteful number, since it uses less digits than its factorization.

397353663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49803 (or 49800 counting only the distinct ones).

The product of its digits is 918540, while the sum is 45.

The square root of 397353663 is about 19933.7317881023. The cubic root of 397353663 is about 735.1778384056.

The spelling of 397353663 in words is "three hundred ninety-seven million, three hundred fifty-three thousand, six hundred sixty-three".