8519449157 has 2 divisors, whose sum is σ = 8519449158. Its totient is φ = 8519449156.

The previous prime is 8519449129. The next prime is 8519449177. The reversal of 8519449157 is 7519449158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4271798881 + 4247650276 = 65359^2 + 65174^2 .

It is a cyclic number.

It is not a de Polignac number, because 8519449157 - 2⁶ = 8519449093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8519449099 and 8519449108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8519449177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259724578 + 4259724579.

It is an arithmetic number, because the mean of its divisors is an integer number (4259724579).

Almost surely, 2^8519449157 is an apocalyptic number.

It is an amenable number.

8519449157 is a deficient number, since it is larger than the sum of its proper divisors (1).

8519449157 is an equidigital number, since it uses as much as digits as its factorization.

8519449157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 53.

The square root of 8519449157 is about 92300.8621682376. The cubic root of 8519449157 is about 2042.3829289987.

Subtracting from 8519449157 its reverse (7519449158), we obtain a palindrome (999999999).

The spelling of 8519449157 in words is "eight billion, five hundred nineteen million, four hundred forty-nine thousand, one hundred fifty-seven".