678349201 has 2 divisors, whose sum is σ = 678349202. Its totient is φ = 678349200.

The previous prime is 678349193. The next prime is 678349211. The reversal of 678349201 is 102943876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677300625 + 1048576 = 26025^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 678349201 - 2³ = 678349193 is a prime.

It is not a weakly prime, because it can be changed into another prime (678349211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339174600 + 339174601.

It is an arithmetic number, because the mean of its divisors is an integer number (339174601).

Almost surely, 2^678349201 is an apocalyptic number.

It is an amenable number.

678349201 is a deficient number, since it is larger than the sum of its proper divisors (1).

678349201 is an equidigital number, since it uses as much as digits as its factorization.

678349201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 678349201 is about 26045.1377612022. The cubic root of 678349201 is about 878.6537615422.

The spelling of 678349201 in words is "six hundred seventy-eight million, three hundred forty-nine thousand, two hundred one".