29987987 has 2 divisors, whose sum is σ = 29987988. Its totient is φ = 29987986.

The previous prime is 29987981. The next prime is 29988029. The reversal of 29987987 is 78978992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29987987 - 2⁸ = 29987731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29987981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14993993 + 14993994.

It is an arithmetic number, because the mean of its divisors is an integer number (14993994).

Almost surely, 2^29987987 is an apocalyptic number.

29987987 is a deficient number, since it is larger than the sum of its proper divisors (1).

29987987 is an equidigital number, since it uses as much as digits as its factorization.

29987987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 29987987 is about 5476.1288334005. The cubic root of 29987987 is about 310.6817704092.

The spelling of 29987987 in words is "twenty-nine million, nine hundred eighty-seven thousand, nine hundred eighty-seven".