678142033 has 2 divisors, whose sum is σ = 678142034. Its totient is φ = 678142032.

The previous prime is 678142007. The next prime is 678142093. The reversal of 678142033 is 330241876.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656538129 + 21603904 = 25623^2 + 4648^2 .

It is a cyclic number.

It is not a de Polignac number, because 678142033 - 2²¹ = 676044881 is a prime.

It is equal to p_35178631 and since 678142033 and 35178631 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678142033.

It is not a weakly prime, because it can be changed into another prime (678142093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339071016 + 339071017.

It is an arithmetic number, because the mean of its divisors is an integer number (339071017).

Almost surely, 2^678142033 is an apocalyptic number.

It is an amenable number.

678142033 is a deficient number, since it is larger than the sum of its proper divisors (1).

678142033 is an equidigital number, since it uses as much as digits as its factorization.

678142033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 678142033 is about 26041.1603620115. The cubic root of 678142033 is about 878.5643054155.

The spelling of 678142033 in words is "six hundred seventy-eight million, one hundred forty-two thousand, thirty-three".