29320681 has 4 divisors (see below), whose sum is σ = 31576132. Its totient is φ = 27065232.

The previous prime is 29320679. The next prime is 29320693. The reversal of 29320681 is 18602392.

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 10830681 + 18490000 = 3291^2 + 4300^2 .

It is a cyclic number.

It is not a de Polignac number, because 29320681 - 2¹ = 29320679 is a prime.

It is a super-2 number, since 2×29320681² = 1719404668607522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29320661) 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 3 ways as a sum of consecutive naturals, for example, 1127706 + ... + 1127731.

It is an arithmetic number, because the mean of its divisors is an integer number (7894033).

Almost surely, 2^29320681 is an apocalyptic number.

It is an amenable number.

29320681 is a deficient number, since it is larger than the sum of its proper divisors (2255451).

29320681 is a wasteful number, since it uses less digits than its factorization.

29320681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255450.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 29320681 is about 5414.8574311795. The cubic root of 29320681 is about 308.3599862684.

The spelling of 29320681 in words is "twenty-nine million, three hundred twenty thousand, six hundred eighty-one".