73838221 has 4 divisors (see below), whose sum is σ = 74940352. Its totient is φ = 72736092.

The previous prime is 73838209. The next prime is 73838231. The reversal of 73838221 is 12283837.

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: 12283837 = 157 ⋅78241.

It is a cyclic number.

It is not a de Polignac number, because 73838221 - 2⁵ = 73838189 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 (73838231) 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, 550965 + ... + 551098.

It is an arithmetic number, because the mean of its divisors is an integer number (18735088).

Almost surely, 2^73838221 is an apocalyptic number.

It is an amenable number.

73838221 is a deficient number, since it is larger than the sum of its proper divisors (1102131).

73838221 is a wasteful number, since it uses less digits than its factorization.

73838221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102130.

The product of its digits is 16128, while the sum is 34.

The square root of 73838221 is about 8592.9169087103. The cubic root of 73838221 is about 419.5274750054.

The spelling of 73838221 in words is "seventy-three million, eight hundred thirty-eight thousand, two hundred twenty-one".