8551420697 has 4 divisors (see below), whose sum is σ = 8551606836. Its totient is φ = 8551234560.

The previous prime is 8551420681. The next prime is 8551420777. The reversal of 8551420697 is 7960241558.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7248138496 + 1303282201 = 85136^2 + 36101^2 .

It is a cyclic number.

It is not a de Polignac number, because 8551420697 - 2⁴ = 8551420681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8551450697) 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, 30773 + ... + 134349.

It is an arithmetic number, because the mean of its divisors is an integer number (2137901709).

Almost surely, 2^8551420697 is an apocalyptic number.

It is an amenable number.

8551420697 is a deficient number, since it is larger than the sum of its proper divisors (186139).

8551420697 is a wasteful number, since it uses less digits than its factorization.

8551420697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186138.

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 8551420697 is about 92473.8919749785. The cubic root of 8551420697 is about 2044.9346047081.

The spelling of 8551420697 in words is "eight billion, five hundred fifty-one million, four hundred twenty thousand, six hundred ninety-seven".