694343209979 has 2 divisors, whose sum is σ = 694343209980. Its totient is φ = 694343209978.

The previous prime is 694343209921. The next prime is 694343210009. The reversal of 694343209979 is 979902343496.

694343209979 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-694343209979 is a prime.

It is a super-2 number, since 2×694343209979² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (694343209909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347171604989 + 347171604990.

It is an arithmetic number, because the mean of its divisors is an integer number (347171604990).

Almost surely, 2^694343209979 is an apocalyptic number.

694343209979 is a deficient number, since it is larger than the sum of its proper divisors (1).

694343209979 is an equidigital number, since it uses as much as digits as its factorization.

694343209979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 65.

The spelling of 694343209979 in words is "six hundred ninety-four billion, three hundred forty-three million, two hundred nine thousand, nine hundred seventy-nine".