8545998397 has 4 divisors (see below), whose sum is σ = 8546659840. Its totient is φ = 8545336956.

The previous prime is 8545998389. The next prime is 8545998403. The reversal of 8545998397 is 7938995458.

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 8545998397 - 2³ = 8545998389 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 (8545998697) 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, 310947 + ... + 337312.

It is an arithmetic number, because the mean of its divisors is an integer number (2136664960).

Almost surely, 2^8545998397 is an apocalyptic number.

It is an amenable number.

8545998397 is a deficient number, since it is larger than the sum of its proper divisors (661443).

8545998397 is a wasteful number, since it uses less digits than its factorization.

8545998397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661442.

The product of its digits is 97977600, while the sum is 67.

The square root of 8545998397 is about 92444.5693212965. The cubic root of 8545998397 is about 2044.5022947351.

The spelling of 8545998397 in words is "eight billion, five hundred forty-five million, nine hundred ninety-eight thousand, three hundred ninety-seven".