694404023 has 2 divisors, whose sum is σ = 694404024. Its totient is φ = 694404022.

The previous prime is 694404019. The next prime is 694404037. The reversal of 694404023 is 320404496.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 694404023 - 2² = 694404019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694404923) 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, 347202011 + 347202012.

It is an arithmetic number, because the mean of its divisors is an integer number (347202012).

Almost surely, 2^694404023 is an apocalyptic number.

694404023 is a deficient number, since it is larger than the sum of its proper divisors (1).

694404023 is an equidigital number, since it uses as much as digits as its factorization.

694404023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 694404023 is about 26351.5468805913. The cubic root of 694404023 is about 885.5316256411.

The spelling of 694404023 in words is "six hundred ninety-four million, four hundred four thousand, twenty-three".