30047869 has 4 divisors (see below), whose sum is σ = 30089596. Its totient is φ = 30006144.

The previous prime is 30047861. The next prime is 30047893. The reversal of 30047869 is 96874003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96874003 = 47 ⋅2061149.

It can be written as a sum of positive squares in 2 ways, for example, as 18576100 + 11471769 = 4310^2 + 3387^2 .

It is a cyclic number.

It is not a de Polignac number, because 30047869 - 2³ = 30047861 is a prime.

It is a super-2 number, since 2×30047869² = 1805748862882322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30047861) 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 in 3 ways as a sum of consecutive naturals, for example, 19764 + ... + 21229.

It is an arithmetic number, because the mean of its divisors is an integer number (7522399).

Almost surely, 2^30047869 is an apocalyptic number.

It is an amenable number.

30047869 is a deficient number, since it is larger than the sum of its proper divisors (41727).

30047869 is an equidigital number, since it uses as much as digits as its factorization.

30047869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41726.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 30047869 is about 5481.5936551335. The cubic root of 30047869 is about 310.8884295635. Note that the first 3 decimals are identical.

The spelling of 30047869 in words is "thirty million, forty-seven thousand, eight hundred sixty-nine".