30499971 has 4 divisors (see below), whose sum is σ = 40666632. Its totient is φ = 20333312.

The previous prime is 30499969. The next prime is 30499993. The reversal of 30499971 is 17999403.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30499971 - 2¹ = 30499969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30499961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5083326 + ... + 5083331.

It is an arithmetic number, because the mean of its divisors is an integer number (10166658).

Almost surely, 2^30499971 is an apocalyptic number.

30499971 is a deficient number, since it is larger than the sum of its proper divisors (10166661).

30499971 is a wasteful number, since it uses less digits than its factorization.

30499971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10166660.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 30499971 is about 5522.6778830564. The cubic root of 30499971 is about 312.4398894516.

The spelling of 30499971 in words is "thirty million, four hundred ninety-nine thousand, nine hundred seventy-one".