349923681 has 12 divisors (see below), whose sum is σ = 510083860. Its totient is φ = 231141600.

The previous prime is 349923677. The next prime is 349923683. The reversal of 349923681 is 186329943.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 247590225 + 102333456 = 15735^2 + 10116^2 .

It is not a de Polignac number, because 349923681 - 2² = 349923677 is a prime.

It is a super-2 number, since 2×349923681² = 244893165049179522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (349923683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177370 + ... + 179331.

Almost surely, 2^349923681 is an apocalyptic number.

It is an amenable number.

349923681 is a deficient number, since it is larger than the sum of its proper divisors (160160179).

349923681 is a wasteful number, since it uses less digits than its factorization.

349923681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356816 (or 356813 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 349923681 is about 18706.2471115935. The cubic root of 349923681 is about 704.6786463599.

The spelling of 349923681 in words is "three hundred forty-nine million, nine hundred twenty-three thousand, six hundred eighty-one".