397631303 has 2 divisors, whose sum is σ = 397631304. Its totient is φ = 397631302.

The previous prime is 397631287. The next prime is 397631369. The reversal of 397631303 is 303136793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397631303 - 2⁴ = 397631287 is a prime.

It is a super-2 number, since 2×397631303² = 316221306250955618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397631393) 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 as a sum of consecutive naturals, namely, 198815651 + 198815652.

It is an arithmetic number, because the mean of its divisors is an integer number (198815652).

Almost surely, 2^397631303 is an apocalyptic number.

397631303 is a deficient number, since it is larger than the sum of its proper divisors (1).

397631303 is an equidigital number, since it uses as much as digits as its factorization.

397631303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 35.

The square root of 397631303 is about 19940.6946468773. The cubic root of 397631303 is about 735.3490270071.

The spelling of 397631303 in words is "three hundred ninety-seven million, six hundred thirty-one thousand, three hundred three".