694404481 has 4 divisors (see below), whose sum is σ = 694646100. Its totient is φ = 694162864.

The previous prime is 694404479. The next prime is 694404497. The reversal of 694404481 is 184404496.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 498852225 + 195552256 = 22335^2 + 13984^2 .

It is a cyclic number.

It is not a de Polignac number, because 694404481 - 2¹ = 694404479 is a prime.

It is a super-2 number, since 2×694404481² = 964395166465758722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694404421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116446 + ... + 122263.

It is an arithmetic number, because the mean of its divisors is an integer number (173661525).

Almost surely, 2^694404481 is an apocalyptic number.

It is an amenable number.

694404481 is a deficient number, since it is larger than the sum of its proper divisors (241619).

694404481 is a wasteful number, since it uses less digits than its factorization.

694404481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241618.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 694404481 is about 26351.5555707818. Note that the first 4 decimals coincide. The cubic root of 694404481 is about 885.5318203276.

The spelling of 694404481 in words is "six hundred ninety-four million, four hundred four thousand, four hundred eighty-one".