30769 has 4 divisors (see below), whose sum is σ = 31860. Its totient is φ = 29680.

The previous prime is 30763. The next prime is 30773. The reversal of 30769 is 96703.

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 18225 + 12544 = 135^2 + 112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30769 is a prime.

It is a super-2 number, since 2×30769² = 1893462722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (7965).

2³⁰⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

30769 is a deficient number, since it is larger than the sum of its proper divisors (1091).

30769 is a wasteful number, since it uses less digits than its factorization.

30769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 30769 is about 175.4109460667. The cubic root of 30769 is about 31.3355840645.

The spelling of 30769 in words is "thirty thousand, seven hundred sixty-nine".