73819821 has 8 divisors (see below), whose sum is σ = 100040224. Its totient is φ = 48406320.

The previous prime is 73819817. The next prime is 73819841. The reversal of 73819821 is 12891837.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73819821 - 2² = 73819817 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 73819821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73819841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201511 + ... + 201876.

It is an arithmetic number, because the mean of its divisors is an integer number (12505028).

Almost surely, 2^73819821 is an apocalyptic number.

It is an amenable number.

73819821 is a deficient number, since it is larger than the sum of its proper divisors (26220403).

73819821 is a wasteful number, since it uses less digits than its factorization.

73819821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403451.

The product of its digits is 24192, while the sum is 39.

The square root of 73819821 is about 8591.8461927574. The cubic root of 73819821 is about 419.4926242794.

The spelling of 73819821 in words is "seventy-three million, eight hundred nineteen thousand, eight hundred twenty-one".