30768253 has 4 divisors (see below), whose sum is σ = 30927868. Its totient is φ = 30608640.

The previous prime is 30768251. The next prime is 30768271. The reversal of 30768253 is 35286703.

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 16305444 + 14462809 = 4038^2 + 3803^2 .

It is a cyclic number.

It is not a de Polignac number, because 30768253 - 2¹ = 30768251 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 (30768251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79518 + ... + 79903.

It is an arithmetic number, because the mean of its divisors is an integer number (7731967).

Almost surely, 2^30768253 is an apocalyptic number.

It is an amenable number.

30768253 is a deficient number, since it is larger than the sum of its proper divisors (159615).

30768253 is a wasteful number, since it uses less digits than its factorization.

30768253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159614.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 30768253 is about 5546.9138266247. The cubic root of 30768253 is about 313.3533047730.

The spelling of 30768253 in words is "thirty million, seven hundred sixty-eight thousand, two hundred fifty-three".