30520417 has 4 divisors (see below), whose sum is σ = 30544020. Its totient is φ = 30496816.

The previous prime is 30520393. The next prime is 30520429. The reversal of 30520417 is 71402503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71402503 = 67 ⋅1065709.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 8767521 = 4664^2 + 2961^2 .

It is a cyclic number.

It is not a de Polignac number, because 30520417 - 2¹⁵ = 30487649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30520447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9742 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (7636005).

Almost surely, 2^30520417 is an apocalyptic number.

It is an amenable number.

30520417 is a deficient number, since it is larger than the sum of its proper divisors (23603).

30520417 is a wasteful number, since it uses less digits than its factorization.

30520417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23602.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30520417 is about 5524.5286676784. The cubic root of 30520417 is about 312.5096897262.

The spelling of 30520417 in words is "thirty million, five hundred twenty thousand, four hundred seventeen".