30992149 has 4 divisors (see below), whose sum is σ = 31200300. Its totient is φ = 30784000.

The previous prime is 30992147. The next prime is 30992161. The reversal of 30992149 is 94129903.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15444900 + 15547249 = 3930^2 + 3943^2 .

It is a cyclic number.

It is not a de Polignac number, because 30992149 - 2¹ = 30992147 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 (30992147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103852 + ... + 104149.

It is an arithmetic number, because the mean of its divisors is an integer number (7800075).

Almost surely, 2^30992149 is an apocalyptic number.

It is an amenable number.

30992149 is a deficient number, since it is larger than the sum of its proper divisors (208151).

30992149 is a wasteful number, since it uses less digits than its factorization.

30992149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208150.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 30992149 is about 5567.0592775720. The cubic root of 30992149 is about 314.1115436673. Note that the first 3 decimals are identical.

It can be divided in two parts, 30 and 992149, that multiplied together give a triangular number (29764470 = T₇₇₁₅).

The spelling of 30992149 in words is "thirty million, nine hundred ninety-two thousand, one hundred forty-nine".