29122991 has 8 divisors (see below), whose sum is σ = 31989120. Its totient is φ = 26390232.

The previous prime is 29122987. The next prime is 29123027. The reversal of 29122991 is 19922192.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29122991 - 2² = 29122987 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 (29122901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32885 + ... + 33758.

It is an arithmetic number, because the mean of its divisors is an integer number (3998640).

Almost surely, 2^29122991 is an apocalyptic number.

29122991 is a deficient number, since it is larger than the sum of its proper divisors (2866129).

29122991 is a wasteful number, since it uses less digits than its factorization.

29122991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66685.

The product of its digits is 5832, while the sum is 35.

The square root of 29122991 is about 5396.5721527651. The cubic root of 29122991 is about 307.6654002544.

The spelling of 29122991 in words is "twenty-nine million, one hundred twenty-two thousand, nine hundred ninety-one".