30875047 has 12 divisors (see below), whose sum is σ = 36008496. Its totient is φ = 26396160.

The previous prime is 30875029. The next prime is 30875051. The reversal of 30875047 is 74057803.

30875047 = T₁₀₉₈ + T₁₀₉₉ + ... + T₁₁₄₆.

It is not a de Polignac number, because 30875047 - 2⁷ = 30874919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30875027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30918 + ... + 31900.

It is an arithmetic number, because the mean of its divisors is an integer number (3000708).

Almost surely, 2^30875047 is an apocalyptic number.

30875047 is a deficient number, since it is larger than the sum of its proper divisors (5133449).

30875047 is an equidigital number, since it uses as much as digits as its factorization.

30875047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 30875047 is about 5556.5319219816. The cubic root of 30875047 is about 313.7154270566.

The spelling of 30875047 in words is "thirty million, eight hundred seventy-five thousand, forty-seven".