73209842 has 4 divisors (see below), whose sum is σ = 109814766. Its totient is φ = 36604920.

The previous prime is 73209839. The next prime is 73209847. The reversal of 73209842 is 24890237.

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

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 942841 = 8501^2 + 971^2 .

It is not an unprimeable number, because it can be changed into a prime (73209847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18302459 + ... + 18302462.

Almost surely, 2^73209842 is an apocalyptic number.

73209842 is a deficient number, since it is larger than the sum of its proper divisors (36604924).

73209842 is a wasteful number, since it uses less digits than its factorization.

73209842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36604923.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 73209842 is about 8556.2750072681. The cubic root of 73209842 is about 418.3339935687. Note that the first 3 decimals are identical.

The spelling of 73209842 in words is "seventy-three million, two hundred nine thousand, eight hundred forty-two".