30775249 has 4 divisors (see below), whose sum is σ = 30945460. Its totient is φ = 30605040.

The previous prime is 30775247. The next prime is 30775259. The reversal of 30775249 is 94257703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94257703 = 23 ⋅4098161.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 30603024 = 415^2 + 5532^2 .

It is a cyclic number.

It is not a de Polignac number, because 30775249 - 2¹ = 30775247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30775243) 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, 84834 + ... + 85195.

It is an arithmetic number, because the mean of its divisors is an integer number (7736365).

Almost surely, 2^30775249 is an apocalyptic number.

It is an amenable number.

30775249 is a deficient number, since it is larger than the sum of its proper divisors (170211).

30775249 is a wasteful number, since it uses less digits than its factorization.

30775249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170210.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 30775249 is about 5547.5444117195. The cubic root of 30775249 is about 313.3770527748.

The spelling of 30775249 in words is "thirty million, seven hundred seventy-five thousand, two hundred forty-nine".