29621939 has 4 divisors (see below), whose sum is σ = 31364424. Its totient is φ = 27879456.

The previous prime is 29621923. The next prime is 29621947. The reversal of 29621939 is 93912692.

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

It is not a de Polignac number, because 29621939 - 2⁴ = 29621923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29621896 and 29621905.

It is not an unprimeable number, because it can be changed into a prime (29621909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871217 + ... + 871250.

It is an arithmetic number, because the mean of its divisors is an integer number (7841106).

Almost surely, 2^29621939 is an apocalyptic number.

29621939 is a deficient number, since it is larger than the sum of its proper divisors (1742485).

29621939 is a wasteful number, since it uses less digits than its factorization.

29621939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742484.

The product of its digits is 52488, while the sum is 41.

The square root of 29621939 is about 5442.6040642325. The cubic root of 29621939 is about 309.4124807020.

The spelling of 29621939 in words is "twenty-nine million, six hundred twenty-one thousand, nine hundred thirty-nine".