30992147 has 2 divisors, whose sum is σ = 30992148. Its totient is φ = 30992146.

The previous prime is 30992119. The next prime is 30992161. The reversal of 30992147 is 74129903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30992147 - 2¹⁰ = 30991123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30992107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15496073 + 15496074.

It is an arithmetic number, because the mean of its divisors is an integer number (15496074).

Almost surely, 2^30992147 is an apocalyptic number.

30992147 is a deficient number, since it is larger than the sum of its proper divisors (1).

30992147 is an equidigital number, since it uses as much as digits as its factorization.

30992147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 30992147 is about 5567.0590979439. The cubic root of 30992147 is about 314.1115369105. Note that the first 3 decimals are identical.

The spelling of 30992147 in words is "thirty million, nine hundred ninety-two thousand, one hundred forty-seven".