30135947 has 4 divisors (see below), whose sum is σ = 30189480. Its totient is φ = 30082416.

The previous prime is 30135913. The next prime is 30135967. The reversal of 30135947 is 74953103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74953103 = 683 ⋅109741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30135947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30135967) 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, 25913 + ... + 27050.

It is an arithmetic number, because the mean of its divisors is an integer number (7547370).

Almost surely, 2^30135947 is an apocalyptic number.

30135947 is a deficient number, since it is larger than the sum of its proper divisors (53533).

30135947 is an equidigital number, since it uses as much as digits as its factorization.

30135947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53532.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 30135947 is about 5489.6217538187. The cubic root of 30135947 is about 311.1918977796.

The spelling of 30135947 in words is "thirty million, one hundred thirty-five thousand, nine hundred forty-seven".