73965909 has 4 divisors (see below), whose sum is σ = 98621216. Its totient is φ = 49310604.

The previous prime is 73965901. The next prime is 73965919. The reversal of 73965909 is 90956937.

It is a happy number.

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.

It is not a de Polignac number, because 73965909 - 2³ = 73965901 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 (73965901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12327649 + ... + 12327654.

It is an arithmetic number, because the mean of its divisors is an integer number (24655304).

Almost surely, 2^73965909 is an apocalyptic number.

It is an amenable number.

73965909 is a deficient number, since it is larger than the sum of its proper divisors (24655307).

73965909 is a wasteful number, since it uses less digits than its factorization.

73965909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24655306.

The product of its (nonzero) digits is 459270, while the sum is 48.

The square root of 73965909 is about 8600.3435396500. The cubic root of 73965909 is about 419.7691645374.

The spelling of 73965909 in words is "seventy-three million, nine hundred sixty-five thousand, nine hundred nine".