1047816857 has 2 divisors, whose sum is σ = 1047816858. Its totient is φ = 1047816856.

The previous prime is 1047816821. The next prime is 1047816863. The reversal of 1047816857 is 7586187401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674129296 + 373687561 = 25964^2 + 19331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1047816857 - 2¹² = 1047812761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1047816877) 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, 523908428 + 523908429.

It is an arithmetic number, because the mean of its divisors is an integer number (523908429).

Almost surely, 2^1047816857 is an apocalyptic number.

It is an amenable number.

1047816857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047816857 is an equidigital number, since it uses as much as digits as its factorization.

1047816857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 47.

The square root of 1047816857 is about 32369.9993358048. Note that the first 3 decimals coincide. The cubic root of 1047816857 is about 1015.6914430908.

The spelling of 1047816857 in words is "one billion, forty-seven million, eight hundred sixteen thousand, eight hundred fifty-seven".