67830857 has 2 divisors, whose sum is σ = 67830858. Its totient is φ = 67830856.

The previous prime is 67830811. The next prime is 67830869. The reversal of 67830857 is 75803876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67584841 + 246016 = 8221^2 + 496^2 .

It is a cyclic number.

It is not a de Polignac number, because 67830857 - 2⁶ = 67830793 is a prime.

It is a super-2 number, since 2×67830857² = 9202050322708898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67830457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33915428 + 33915429.

It is an arithmetic number, because the mean of its divisors is an integer number (33915429).

Almost surely, 2^67830857 is an apocalyptic number.

It is an amenable number.

67830857 is a deficient number, since it is larger than the sum of its proper divisors (1).

67830857 is an equidigital number, since it uses as much as digits as its factorization.

67830857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 67830857 is about 8235.9490649226. The cubic root of 67830857 is about 407.8268059758.

The spelling of 67830857 in words is "sixty-seven million, eight hundred thirty thousand, eight hundred fifty-seven".