73125909 has 10 divisors (see below), whose sum is σ = 109237590. Its totient is φ = 48750552.

The previous prime is 73125893. The next prime is 73125911. The reversal of 73125909 is 90952137.

It can be written as a sum of positive squares in only one way, i.e., 73102500 + 23409 = 8550^2 + 153^2 .

It is not a de Polignac number, because 73125909 - 2⁴ = 73125893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73125979) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 451314 + ... + 451475.

It is an arithmetic number, because the mean of its divisors is an integer number (10923759).

Almost surely, 2^73125909 is an apocalyptic number.

It is an amenable number.

73125909 is a deficient number, since it is larger than the sum of its proper divisors (36111681).

73125909 is an equidigital number, since it uses as much as digits as its factorization.

73125909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902801 (or 902792 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 73125909 is about 8551.3688377943. The cubic root of 73125909 is about 418.1740630959.

The spelling of 73125909 in words is "seventy-three million, one hundred twenty-five thousand, nine hundred nine".