38623421 has 4 divisors (see below), whose sum is σ = 38723100. Its totient is φ = 38523744.

The previous prime is 38623399. The next prime is 38623433. The reversal of 38623421 is 12432683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27825625 + 10797796 = 5275^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 38623421 - 2⁶ = 38623357 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 (38623441) 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, 49256 + ... + 50033.

It is an arithmetic number, because the mean of its divisors is an integer number (9680775).

Almost surely, 2^38623421 is an apocalyptic number.

It is an amenable number.

38623421 is a deficient number, since it is larger than the sum of its proper divisors (99679).

38623421 is an equidigital number, since it uses as much as digits as its factorization.

38623421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99678.

The product of its digits is 6912, while the sum is 29.

The square root of 38623421 is about 6214.7744126396. The cubic root of 38623421 is about 338.0261087636.

The spelling of 38623421 in words is "thirty-eight million, six hundred twenty-three thousand, four hundred twenty-one".