694390061 has 2 divisors, whose sum is σ = 694390062. Its totient is φ = 694390060.

The previous prime is 694390051. The next prime is 694390069. The reversal of 694390061 is 160093496.

694390061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678342025 + 16048036 = 26045^2 + 4006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-694390061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 694389997 and 694390024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694390069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347195030 + 347195031.

It is an arithmetic number, because the mean of its divisors is an integer number (347195031).

Almost surely, 2^694390061 is an apocalyptic number.

It is an amenable number.

694390061 is a deficient number, since it is larger than the sum of its proper divisors (1).

694390061 is an equidigital number, since it uses as much as digits as its factorization.

694390061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 694390061 is about 26351.2819612253. The cubic root of 694390061 is about 885.5256906354.

The spelling of 694390061 in words is "six hundred ninety-four million, three hundred ninety thousand, sixty-one".