73275709 has 4 divisors (see below), whose sum is σ = 78912316. Its totient is φ = 67639104.

The previous prime is 73275673. The next prime is 73275737. The reversal of 73275709 is 90757237.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4020025 + 69255684 = 2005^2 + 8322^2 .

It is not a de Polignac number, because 73275709 - 2¹⁵ = 73242941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73245709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2818284 + ... + 2818309.

It is an arithmetic number, because the mean of its divisors is an integer number (19728079).

Almost surely, 2^73275709 is an apocalyptic number.

It is an amenable number.

73275709 is a deficient number, since it is larger than the sum of its proper divisors (5636607).

73275709 is a wasteful number, since it uses less digits than its factorization.

73275709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636606.

The product of its (nonzero) digits is 92610, while the sum is 40.

The square root of 73275709 is about 8560.1231883659. The cubic root of 73275709 is about 418.4594145274.

It can be divided in two parts, 73275 and 709, that added together give a square (73984 = 272²).

The spelling of 73275709 in words is "seventy-three million, two hundred seventy-five thousand, seven hundred nine".