397330871 has 4 divisors (see below), whose sum is σ = 454092432. Its totient is φ = 340569312.

The previous prime is 397330859. The next prime is 397330873. The reversal of 397330871 is 178033793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178033793 = 7 ⋅25433399.

It is a cyclic number.

It is not a de Polignac number, because 397330871 - 2⁶ = 397330807 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 (397330873) 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 3 ways as a sum of consecutive naturals, for example, 28380770 + ... + 28380783.

It is an arithmetic number, because the mean of its divisors is an integer number (113523108).

Almost surely, 2^397330871 is an apocalyptic number.

397330871 is a deficient number, since it is larger than the sum of its proper divisors (56761561).

397330871 is an equidigital number, since it uses as much as digits as its factorization.

397330871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56761560.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 397330871 is about 19933.1600856462. The cubic root of 397330871 is about 735.1637816636.

The spelling of 397330871 in words is "three hundred ninety-seven million, three hundred thirty thousand, eight hundred seventy-one".