8427346397 has 4 divisors (see below), whose sum is σ = 8427972480. Its totient is φ = 8426720316.

The previous prime is 8427346309. The next prime is 8427346423. The reversal of 8427346397 is 7936437248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8427346397 - 2¹⁰ = 8427345373 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 (8427346307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292397 + ... + 319922.

It is an arithmetic number, because the mean of its divisors is an integer number (2106993120).

Almost surely, 2^8427346397 is an apocalyptic number.

It is an amenable number.

8427346397 is a deficient number, since it is larger than the sum of its proper divisors (626083).

8427346397 is a wasteful number, since it uses less digits than its factorization.

8427346397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626082.

The product of its digits is 6096384, while the sum is 53.

The square root of 8427346397 is about 91800.5795025282. The cubic root of 8427346397 is about 2034.9962589101.

The spelling of 8427346397 in words is "eight billion, four hundred twenty-seven million, three hundred forty-six thousand, three hundred ninety-seven".