694413981 has 24 divisors (see below), whose sum is σ = 1037836800. Its totient is φ = 446954400.

The previous prime is 694413959. The next prime is 694413989. The reversal of 694413981 is 189314496.

It is not a de Polignac number, because 694413981 - 2⁹ = 694413469 is a prime.

It is a super-2 number, since 2×694413981² = 964421554016536722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694413989) 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 in 23 ways as a sum of consecutive naturals, for example, 125920 + ... + 131318.

It is an arithmetic number, because the mean of its divisors is an integer number (43243200).

Almost surely, 2^694413981 is an apocalyptic number.

It is an amenable number.

694413981 is a deficient number, since it is larger than the sum of its proper divisors (343422819).

694413981 is a wasteful number, since it uses less digits than its factorization.

694413981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897 (or 5894 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 694413981 is about 26351.7358251786. The cubic root of 694413981 is about 885.5358585667.

The spelling of 694413981 in words is "six hundred ninety-four million, four hundred thirteen thousand, nine hundred eighty-one".