29780071 has 4 divisors (see below), whose sum is σ = 30807000. Its totient is φ = 28753144.

The previous prime is 29780053. The next prime is 29780137. The reversal of 29780071 is 17008792.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29780071 - 2⁷ = 29779943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29780171) 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 3 ways as a sum of consecutive naturals, for example, 513421 + ... + 513478.

It is an arithmetic number, because the mean of its divisors is an integer number (7701750).

Almost surely, 2^29780071 is an apocalyptic number.

29780071 is a deficient number, since it is larger than the sum of its proper divisors (1026929).

29780071 is a wasteful number, since it uses less digits than its factorization.

29780071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026928.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 29780071 is about 5457.1119651332. Note that the first 3 decimals coincide. The cubic root of 29780071 is about 309.9620869347.

The spelling of 29780071 in words is "twenty-nine million, seven hundred eighty thousand, seventy-one".