30495947 has 4 divisors (see below), whose sum is σ = 30531216. Its totient is φ = 30460680.

The previous prime is 30495937. The next prime is 30495961. The reversal of 30495947 is 74959403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74959403 = 29 ⋅2584807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30495947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30495917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16304 + ... + 18077.

It is an arithmetic number, because the mean of its divisors is an integer number (7632804).

Almost surely, 2^30495947 is an apocalyptic number.

30495947 is a deficient number, since it is larger than the sum of its proper divisors (35269).

30495947 is an equidigital number, since it uses as much as digits as its factorization.

30495947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35268.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 30495947 is about 5522.3135550238. The cubic root of 30495947 is about 312.4261483083.

The spelling of 30495947 in words is "thirty million, four hundred ninety-five thousand, nine hundred forty-seven".