30623121 has 12 divisors (see below), whose sum is σ = 44317572. Its totient is φ = 20376576.

The previous prime is 30623111. The next prime is 30623123. The reversal of 30623121 is 12132603.

30623121 is a `hidden beast` number, since 30 + 623 + 12 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29582721 + 1040400 = 5439^2 + 1020^2 .

It is not a de Polignac number, because 30623121 - 2¹³ = 30614929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30623094 and 30623103.

It is not an unprimeable number, because it can be changed into a prime (30623123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2245 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (3693131).

Almost surely, 2^30623121 is an apocalyptic number.

It is an amenable number.

30623121 is a deficient number, since it is larger than the sum of its proper divisors (13694451).

30623121 is a wasteful number, since it uses less digits than its factorization.

30623121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480 (or 6477 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 30623121 is about 5533.8161335556. The cubic root of 30623121 is about 312.8598385063.

Adding to 30623121 its reverse (12132603), we get a palindrome (42755724).

The spelling of 30623121 in words is "thirty million, six hundred twenty-three thousand, one hundred twenty-one".