73434821 has 8 divisors (see below), whose sum is σ = 75275904. Its totient is φ = 71605440.

The previous prime is 73434817. The next prime is 73434827. The reversal of 73434821 is 12843437.

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

It is not a de Polignac number, because 73434821 - 2² = 73434817 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 (73434827) 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, 10541 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (9409488).

Almost surely, 2^73434821 is an apocalyptic number.

It is an amenable number.

73434821 is a deficient number, since it is larger than the sum of its proper divisors (1841083).

73434821 is a wasteful number, since it uses less digits than its factorization.

73434821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851.

The product of its digits is 16128, while the sum is 32.

The square root of 73434821 is about 8569.4119401509. The cubic root of 73434821 is about 418.7620786298.

The spelling of 73434821 in words is "seventy-three million, four hundred thirty-four thousand, eight hundred twenty-one".