29987669 has 2 divisors, whose sum is σ = 29987670. Its totient is φ = 29987668.

The previous prime is 29987623. The next prime is 29987701. The reversal of 29987669 is 96678992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20593444 + 9394225 = 4538^2 + 3065^2 .

It is a cyclic number.

It is not a de Polignac number, because 29987669 - 2⁸ = 29987413 is a prime.

It is a super-2 number, since 2×29987669² = 1798520584107122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29987869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14993834 + 14993835.

It is an arithmetic number, because the mean of its divisors is an integer number (14993835).

Almost surely, 2^29987669 is an apocalyptic number.

It is an amenable number.

29987669 is a deficient number, since it is larger than the sum of its proper divisors (1).

29987669 is an equidigital number, since it uses as much as digits as its factorization.

29987669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The square root of 29987669 is about 5476.0997982141. The cubic root of 29987669 is about 310.6806722233.

The spelling of 29987669 in words is "twenty-nine million, nine hundred eighty-seven thousand, six hundred sixty-nine".