29971641 has 8 divisors (see below), whose sum is σ = 45671104. Its totient is φ = 17126640.

The previous prime is 29971577. The next prime is 29971651. The reversal of 29971641 is 14617992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29971641 - 2⁶ = 29971577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29971641.

It is not an unprimeable number, because it can be changed into a prime (29971651) 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 7 ways as a sum of consecutive naturals, for example, 713590 + ... + 713631.

It is an arithmetic number, because the mean of its divisors is an integer number (5708888).

Almost surely, 2^29971641 is an apocalyptic number.

29971641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29971641 is a deficient number, since it is larger than the sum of its proper divisors (15699463).

29971641 is a wasteful number, since it uses less digits than its factorization.

29971641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427231.

The product of its digits is 27216, while the sum is 39.

The square root of 29971641 is about 5474.6361522936. The cubic root of 29971641 is about 310.6253108318.

The spelling of 29971641 in words is "twenty-nine million, nine hundred seventy-one thousand, six hundred forty-one".