29391997 has 8 divisors (see below), whose sum is σ = 31314816. Its totient is φ = 27490752.

The previous prime is 29391961. The next prime is 29392003. The reversal of 29391997 is 79919392.

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 29391997 - 2¹⁵ = 29359229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29391997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29391797) 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, 2533 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (3914352).

Almost surely, 2^29391997 is an apocalyptic number.

It is an amenable number.

29391997 is a deficient number, since it is larger than the sum of its proper divisors (1922819).

29391997 is a wasteful number, since it uses less digits than its factorization.

29391997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10787.

The product of its digits is 275562, while the sum is 49.

The square root of 29391997 is about 5421.4386467062. The cubic root of 29391997 is about 308.6097894185.

The spelling of 29391997 in words is "twenty-nine million, three hundred ninety-one thousand, nine hundred ninety-seven".