29987039 has 4 divisors (see below), whose sum is σ = 30684456. Its totient is φ = 29289624.

The previous prime is 29987011. The next prime is 29987047. The reversal of 29987039 is 93078992.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29987039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29986984 and 29987002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29987059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348644 + ... + 348729.

It is an arithmetic number, because the mean of its divisors is an integer number (7671114).

Almost surely, 2^29987039 is an apocalyptic number.

29987039 is a deficient number, since it is larger than the sum of its proper divisors (697417).

29987039 is an equidigital number, since it uses as much as digits as its factorization.

29987039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697416.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 29987039 is about 5476.0422752203. The cubic root of 29987039 is about 310.6784965491.

The spelling of 29987039 in words is "twenty-nine million, nine hundred eighty-seven thousand, thirty-nine".