30173421 has 4 divisors (see below), whose sum is σ = 40231232. Its totient is φ = 20115612.

The previous prime is 30173413. The next prime is 30173431. The reversal of 30173421 is 12437103.

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.

It is not a de Polignac number, because 30173421 - 2³ = 30173413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30173431) 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, 5028901 + ... + 5028906.

It is an arithmetic number, because the mean of its divisors is an integer number (10057808).

Almost surely, 2^30173421 is an apocalyptic number.

It is an amenable number.

30173421 is a deficient number, since it is larger than the sum of its proper divisors (10057811).

30173421 is a wasteful number, since it uses less digits than its factorization.

30173421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057810.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 30173421 is about 5493.0338611736. The cubic root of 30173421 is about 311.3208332199.

The spelling of 30173421 in words is "thirty million, one hundred seventy-three thousand, four hundred twenty-one".