30706047 has 10 divisors (see below), whose sum is σ = 45869648. Its totient is φ = 20470644.

The previous prime is 30706037. The next prime is 30706057. The reversal of 30706047 is 74060703.

It is an interprime number because it is at equal distance from previous prime (30706037) and next prime (30706057).

It is a de Polignac number, because none of the positive numbers 2^k-30706047 is a prime.

It is a super-2 number, since 2×30706047² = 1885722644732418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30706047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30706037) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 189463 + ... + 189624.

Almost surely, 2^30706047 is an apocalyptic number.

30706047 is a deficient number, since it is larger than the sum of its proper divisors (15163601).

30706047 is an equidigital number, since it uses as much as digits as its factorization.

30706047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379099 (or 379090 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 30706047 is about 5541.3037274634. The cubic root of 30706047 is about 313.1419873175.

The spelling of 30706047 in words is "thirty million, seven hundred six thousand, forty-seven".