29942139 has 8 divisors (see below), whose sum is σ = 41002000. Its totient is φ = 19421856.

The previous prime is 29942111. The next prime is 29942141. The reversal of 29942139 is 93124992.

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

It is not a de Polignac number, because 29942139 - 2¹⁶ = 29876603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29942097 and 29942106.

It is not an unprimeable number, because it can be changed into a prime (29942179) 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, 134764 + ... + 134985.

It is an arithmetic number, because the mean of its divisors is an integer number (5125250).

Almost surely, 2^29942139 is an apocalyptic number.

29942139 is a deficient number, since it is larger than the sum of its proper divisors (11059861).

29942139 is a wasteful number, since it uses less digits than its factorization.

29942139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269789.

The product of its digits is 34992, while the sum is 39.

The square root of 29942139 is about 5471.9410632791. The cubic root of 29942139 is about 310.5233580515.

The spelling of 29942139 in words is "twenty-nine million, nine hundred forty-two thousand, one hundred thirty-nine".