29979081 has 18 divisors (see below), whose sum is σ = 47599370. Its totient is φ = 18168480.

The previous prime is 29979073. The next prime is 29979119. The reversal of 29979081 is 18097992.

It can be written as a sum of positive squares in only one way, i.e., 23853456 + 6125625 = 4884^2 + 2475^2 .

It is not a de Polignac number, because 29979081 - 2³ = 29979073 is a prime.

It is a super-2 number, since 2×29979081² = 1797490595209122, 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 (29979181) 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 17 ways as a sum of consecutive naturals, for example, 12676 + ... + 14853.

Almost surely, 2^29979081 is an apocalyptic number.

It is an amenable number.

29979081 is a deficient number, since it is larger than the sum of its proper divisors (17620289).

29979081 is a wasteful number, since it uses less digits than its factorization.

29979081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27557 (or 27543 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 29979081 is about 5475.3156073417. The cubic root of 29979081 is about 310.6510113611.

The spelling of 29979081 in words is "twenty-nine million, nine hundred seventy-nine thousand, eighty-one".