30887669 has 2 divisors, whose sum is σ = 30887670. Its totient is φ = 30887668.

The previous prime is 30887653. The next prime is 30887671. The reversal of 30887669 is 96678803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22448644 + 8439025 = 4738^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 30887669 - 2⁴ = 30887653 is a prime.

It is a super-2 number, since 2×30887669² = 1908096192507122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 30887671, it forms a pair of twin primes.

It is a Chen 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 (30887629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15443834 + 15443835.

It is an arithmetic number, because the mean of its divisors is an integer number (15443835).

Almost surely, 2^30887669 is an apocalyptic number.

It is an amenable number.

30887669 is a deficient number, since it is larger than the sum of its proper divisors (1).

30887669 is an equidigital number, since it uses as much as digits as its factorization.

30887669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 30887669 is about 5557.6675863171. The cubic root of 30887669 is about 313.7581711390.

The spelling of 30887669 in words is "thirty million, eight hundred eighty-seven thousand, six hundred sixty-nine".