397948403 has 2 divisors, whose sum is σ = 397948404. Its totient is φ = 397948402.

The previous prime is 397948387. The next prime is 397948487. The reversal of 397948403 is 304849793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397948403 - 2⁴ = 397948387 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (397948493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198974201 + 198974202.

It is an arithmetic number, because the mean of its divisors is an integer number (198974202).

Almost surely, 2^397948403 is an apocalyptic number.

397948403 is a deficient number, since it is larger than the sum of its proper divisors (1).

397948403 is an equidigital number, since it uses as much as digits as its factorization.

397948403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 397948403 is about 19948.6441393895. The cubic root of 397948403 is about 735.5444485928.

The spelling of 397948403 in words is "three hundred ninety-seven million, nine hundred forty-eight thousand, four hundred three".