73809225 has 120 divisors (see below), whose sum is σ = 161323008. Its totient is φ = 32659200.

The previous prime is 73809193. The next prime is 73809251. The reversal of 73809225 is 52290837.

It is a happy number.

It is not a de Polignac number, because 73809225 - 2⁵ = 73809193 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73809225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 581112 + ... + 581238.

Almost surely, 2^73809225 is an apocalyptic number.

73809225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

73809225 is an abundant number, since it is smaller than the sum of its proper divisors (87513783).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73809225 is a wasteful number, since it uses less digits than its factorization.

73809225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 73809225 is about 8591.2295394780. The cubic root of 73809225 is about 419.4725521792.

The spelling of 73809225 in words is "seventy-three million, eight hundred nine thousand, two hundred twenty-five".