29957139 has 12 divisors (see below), whose sum is σ = 43368000. Its totient is φ = 19926864.

The previous prime is 29957117. The next prime is 29957149. The reversal of 29957139 is 93175992.

It is a happy number.

It is not a de Polignac number, because 29957139 - 2¹¹ = 29955091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29957094 and 29957103.

It is not an unprimeable number, because it can be changed into a prime (29957149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 837 + ... + 7785.

It is an arithmetic number, because the mean of its divisors is an integer number (3614000).

Almost surely, 2^29957139 is an apocalyptic number.

29957139 is a deficient number, since it is larger than the sum of its proper divisors (13410861).

29957139 is a wasteful number, since it uses less digits than its factorization.

29957139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434 (or 7431 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 29957139 is about 5473.3115204600. The cubic root of 29957139 is about 310.5752032986.

The spelling of 29957139 in words is "twenty-nine million, nine hundred fifty-seven thousand, one hundred thirty-nine".