694247239969 has 2 divisors, whose sum is σ = 694247239970. Its totient is φ = 694247239968.

The previous prime is 694247239943. The next prime is 694247240023. The reversal of 694247239969 is 969932742496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 658837409344 + 35409830625 = 811688^2 + 188175^2 .

It is a cyclic number.

It is not a de Polignac number, because 694247239969 - 2¹⁷ = 694247108897 is a prime.

It is a super-2 number, since 2×694247239969² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 694247239898 and 694247239907.

It is not a weakly prime, because it can be changed into another prime (694247233969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347123619984 + 347123619985.

It is an arithmetic number, because the mean of its divisors is an integer number (347123619985).

Almost surely, 2^694247239969 is an apocalyptic number.

It is an amenable number.

694247239969 is a deficient number, since it is larger than the sum of its proper divisors (1).

694247239969 is an equidigital number, since it uses as much as digits as its factorization.

694247239969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317447424, while the sum is 70.

The spelling of 694247239969 in words is "six hundred ninety-four billion, two hundred forty-seven million, two hundred thirty-nine thousand, nine hundred sixty-nine".