8557451939 has 2 divisors, whose sum is σ = 8557451940. Its totient is φ = 8557451938.

The previous prime is 8557451927. The next prime is 8557452011. The reversal of 8557451939 is 9391547558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8557451939 - 2⁴ = 8557451923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8557451339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278725969 + 4278725970.

It is an arithmetic number, because the mean of its divisors is an integer number (4278725970).

Almost surely, 2^8557451939 is an apocalyptic number.

8557451939 is a deficient number, since it is larger than the sum of its proper divisors (1).

8557451939 is an equidigital number, since it uses as much as digits as its factorization.

8557451939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804000, while the sum is 56.

The square root of 8557451939 is about 92506.4967394183. The cubic root of 8557451939 is about 2045.4152498734.

The spelling of 8557451939 in words is "eight billion, five hundred fifty-seven million, four hundred fifty-one thousand, nine hundred thirty-nine".