30661023 has 4 divisors (see below), whose sum is σ = 40881368. Its totient is φ = 20440680.

The previous prime is 30660983. The next prime is 30661027. The reversal of 30661023 is 32016603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32016603 = 3 ⋅10672201.

It is not a de Polignac number, because 30661023 - 2²⁰ = 29612447 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 (30661027) 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, 5110168 + ... + 5110173.

It is an arithmetic number, because the mean of its divisors is an integer number (10220342).

Almost surely, 2^30661023 is an apocalyptic number.

30661023 is a deficient number, since it is larger than the sum of its proper divisors (10220345).

30661023 is a wasteful number, since it uses less digits than its factorization.

30661023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220344.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 30661023 is about 5537.2396552795. The cubic root of 30661023 is about 312.9888600254.

Adding to 30661023 its reverse (32016603), we get a palindrome (62677626).

The spelling of 30661023 in words is "thirty million, six hundred sixty-one thousand, twenty-three".