29720973 has 4 divisors (see below), whose sum is σ = 39627968. Its totient is φ = 19813980.

The previous prime is 29720903. The next prime is 29720983. The reversal of 29720973 is 37902792.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 29720973 - 2⁹ = 29720461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29720903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4953493 + ... + 4953498.

It is an arithmetic number, because the mean of its divisors is an integer number (9906992).

Almost surely, 2^29720973 is an apocalyptic number.

It is an amenable number.

29720973 is a deficient number, since it is larger than the sum of its proper divisors (9906995).

29720973 is an equidigital number, since it uses as much as digits as its factorization.

29720973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9906994.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 29720973 is about 5451.6945072152. The cubic root of 29720973 is about 309.7569131444.

The spelling of 29720973 in words is "twenty-nine million, seven hundred twenty thousand, nine hundred seventy-three".