814412857 has 2 divisors, whose sum is σ = 814412858. Its totient is φ = 814412856.

The previous prime is 814412843. The next prime is 814412899. The reversal of 814412857 is 758214418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 814303296 + 109561 = 28536^2 + 331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814412857 is a prime.

It is not a weakly prime, because it can be changed into another prime (814412057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407206428 + 407206429.

It is an arithmetic number, because the mean of its divisors is an integer number (407206429).

Almost surely, 2^814412857 is an apocalyptic number.

It is an amenable number.

814412857 is a deficient number, since it is larger than the sum of its proper divisors (1).

814412857 is an equidigital number, since it uses as much as digits as its factorization.

814412857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 814412857 is about 28537.9196333580. The cubic root of 814412857 is about 933.8594983735.

The spelling of 814412857 in words is "eight hundred fourteen million, four hundred twelve thousand, eight hundred fifty-seven".