29439623091 has 16 divisors (see below), whose sum is σ = 40552501248. Its totient is φ = 18977625600.

The previous prime is 29439623077. The next prime is 29439623159. The reversal of 29439623091 is 19032693492.

It is not a de Polignac number, because 29439623091 - 2⁹ = 29439622579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29439623091.

It is not an unprimeable number, because it can be changed into a prime (29439623491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16875 + ... + 243236.

It is an arithmetic number, because the mean of its divisors is an integer number (2534531328).

Almost surely, 2^29439623091 is an apocalyptic number.

29439623091 is a deficient number, since it is larger than the sum of its proper divisors (11112878157).

29439623091 is a wasteful number, since it uses less digits than its factorization.

29439623091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261362.

The product of its (nonzero) digits is 629856, while the sum is 48.

The spelling of 29439623091 in words is "twenty-nine billion, four hundred thirty-nine million, six hundred twenty-three thousand, ninety-one".