30123397 has 4 divisors (see below), whose sum is σ = 30858156. Its totient is φ = 29388640.

The previous prime is 30123391. The next prime is 30123409. The reversal of 30123397 is 79332103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79332103 = 317 ⋅250259.

It can be written as a sum of positive squares in 2 ways, for example, as 10329796 + 19793601 = 3214^2 + 4449^2 .

It is a cyclic number.

It is not a de Polignac number, because 30123397 - 2¹¹ = 30121349 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 (30123391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367318 + ... + 367399.

It is an arithmetic number, because the mean of its divisors is an integer number (7714539).

Almost surely, 2^30123397 is an apocalyptic number.

It is an amenable number.

30123397 is a deficient number, since it is larger than the sum of its proper divisors (734759).

30123397 is an equidigital number, since it uses as much as digits as its factorization.

30123397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734758.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 30123397 is about 5488.4785687839. The cubic root of 30123397 is about 311.1486935560.

The spelling of 30123397 in words is "thirty million, one hundred twenty-three thousand, three hundred ninety-seven".