29138397 has 4 divisors (see below), whose sum is σ = 38851200. Its totient is φ = 19425596.

The previous prime is 29138383. The next prime is 29138407. The reversal of 29138397 is 79383192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29138397 - 2⁸ = 29138141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29138377) 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, 4856397 + ... + 4856402.

It is an arithmetic number, because the mean of its divisors is an integer number (9712800).

Almost surely, 2^29138397 is an apocalyptic number.

It is an amenable number.

29138397 is a deficient number, since it is larger than the sum of its proper divisors (9712803).

29138397 is an equidigital number, since it uses as much as digits as its factorization.

29138397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9712802.

The product of its digits is 81648, while the sum is 42.

The square root of 29138397 is about 5397.9993516117. Note that the first 3 decimals coincide. The cubic root of 29138397 is about 307.7196421373.

The spelling of 29138397 in words is "twenty-nine million, one hundred thirty-eight thousand, three hundred ninety-seven".