694238939 has 2 divisors, whose sum is σ = 694238940. Its totient is φ = 694238938.

The previous prime is 694238933. The next prime is 694238947. The reversal of 694238939 is 939832496.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-694238939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (694238933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347119469 + 347119470.

It is an arithmetic number, because the mean of its divisors is an integer number (347119470).

Almost surely, 2^694238939 is an apocalyptic number.

694238939 is a deficient number, since it is larger than the sum of its proper divisors (1).

694238939 is an equidigital number, since it uses as much as digits as its factorization.

694238939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 53.

The square root of 694238939 is about 26348.4143545679. The cubic root of 694238939 is about 885.4614461854.

The spelling of 694238939 in words is "six hundred ninety-four million, two hundred thirty-eight thousand, nine hundred thirty-nine".