73195709 has 4 divisors (see below), whose sum is σ = 73216416. Its totient is φ = 73175004.

The previous prime is 73195699. The next prime is 73195741. The reversal of 73195709 is 90759137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90759137 = 7 ⋅12965591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73195709 is a prime.

It is a super-2 number, since 2×73195709² = 10715223632025362, which contains 22 as substring.

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 (73195799) 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, 3569 + ... + 12614.

It is an arithmetic number, because the mean of its divisors is an integer number (18304104).

Almost surely, 2^73195709 is an apocalyptic number.

It is an amenable number.

73195709 is a deficient number, since it is larger than the sum of its proper divisors (20707).

73195709 is a wasteful number, since it uses less digits than its factorization.

73195709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20706.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 73195709 is about 8555.4490823101. The cubic root of 73195709 is about 418.3070723486.

The spelling of 73195709 in words is "seventy-three million, one hundred ninety-five thousand, seven hundred nine".