29922947 has 4 divisors (see below), whose sum is σ = 30138360. Its totient is φ = 29707536.

The previous prime is 29922923. The next prime is 29922953. The reversal of 29922947 is 74922992.

It is a happy number.

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 29922947 - 2¹² = 29918851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29922898 and 29922907.

It is not an unprimeable number, because it can be changed into a prime (29922917) 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, 107498 + ... + 107775.

It is an arithmetic number, because the mean of its divisors is an integer number (7534590).

Almost surely, 2^29922947 is an apocalyptic number.

29922947 is a deficient number, since it is larger than the sum of its proper divisors (215413).

29922947 is a wasteful number, since it uses less digits than its factorization.

29922947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215412.

The product of its digits is 163296, while the sum is 44.

The square root of 29922947 is about 5470.1871083172. The cubic root of 29922947 is about 310.4569985301.

The spelling of 29922947 in words is "twenty-nine million, nine hundred twenty-two thousand, nine hundred forty-seven".