867896857 has 2 divisors, whose sum is σ = 867896858. Its totient is φ = 867896856.

The previous prime is 867896819. The next prime is 867896873. The reversal of 867896857 is 758698768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725548096 + 142348761 = 26936^2 + 11931^2 .

It is a cyclic number.

It is not a de Polignac number, because 867896857 - 2²³ = 859508249 is a prime.

It is a super-4 number, since 4×867896857⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (867890857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433948428 + 433948429.

It is an arithmetic number, because the mean of its divisors is an integer number (433948429).

Almost surely, 2^867896857 is an apocalyptic number.

It is an amenable number.

867896857 is a deficient number, since it is larger than the sum of its proper divisors (1).

867896857 is an equidigital number, since it uses as much as digits as its factorization.

867896857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 64.

The square root of 867896857 is about 29460.0892225397. The cubic root of 867896857 is about 953.8703992792.

The spelling of 867896857 in words is "eight hundred sixty-seven million, eight hundred ninety-six thousand, eight hundred fifty-seven".