678501097 has 2 divisors, whose sum is σ = 678501098. Its totient is φ = 678501096.

The previous prime is 678501073. The next prime is 678501107. The reversal of 678501097 is 790105876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455566336 + 222934761 = 21344^2 + 14931^2 .

It is a cyclic number.

It is not a de Polignac number, because 678501097 - 2¹¹ = 678499049 is a prime.

It is not a weakly prime, because it can be changed into another prime (678505097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339250548 + 339250549.

It is an arithmetic number, because the mean of its divisors is an integer number (339250549).

Almost surely, 2^678501097 is an apocalyptic number.

It is an amenable number.

678501097 is a deficient number, since it is larger than the sum of its proper divisors (1).

678501097 is an equidigital number, since it uses as much as digits as its factorization.

678501097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 678501097 is about 26048.0536125063. The cubic root of 678501097 is about 878.7193393847.

The spelling of 678501097 in words is "six hundred seventy-eight million, five hundred one thousand, ninety-seven".