331471897 has 2 divisors, whose sum is σ = 331471898. Its totient is φ = 331471896.

The previous prime is 331471879. The next prime is 331471901. The reversal of 331471897 is 798174133.

Together with previous prime (331471879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316448521 + 15023376 = 17789^2 + 3876^2 .

It is an emirp because it is prime and its reverse (798174133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331471897 - 2¹¹ = 331469849 is a prime.

It is not a weakly prime, because it can be changed into another prime (331471817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165735948 + 165735949.

It is an arithmetic number, because the mean of its divisors is an integer number (165735949).

Almost surely, 2^331471897 is an apocalyptic number.

It is an amenable number.

331471897 is a deficient number, since it is larger than the sum of its proper divisors (1).

331471897 is an equidigital number, since it uses as much as digits as its factorization.

331471897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 331471897 is about 18206.3696820646. The cubic root of 331471897 is about 692.0682165424.

The spelling of 331471897 in words is "three hundred thirty-one million, four hundred seventy-one thousand, eight hundred ninety-seven".