30442493 has 4 divisors (see below), whose sum is σ = 30504000. Its totient is φ = 30380988.

The previous prime is 30442481. The next prime is 30442499. The reversal of 30442493 is 39424403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39424403 = 1087 ⋅36269.

It is a cyclic number.

It is not a de Polignac number, because 30442493 - 2⁶ = 30442429 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 (30442499) 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, 30005 + ... + 31002.

It is an arithmetic number, because the mean of its divisors is an integer number (7626000).

Almost surely, 2^30442493 is an apocalyptic number.

It is an amenable number.

30442493 is a deficient number, since it is larger than the sum of its proper divisors (61507).

30442493 is an equidigital number, since it uses as much as digits as its factorization.

30442493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61506.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 30442493 is about 5517.4716129764. The cubic root of 30442493 is about 312.2434989607.

Adding to 30442493 its reverse (39424403), we get a palindrome (69866896).

The spelling of 30442493 in words is "thirty million, four hundred forty-two thousand, four hundred ninety-three".