73665947 has 8 divisors (see below), whose sum is σ = 78098256. Its totient is φ = 69244672.

The previous prime is 73665937. The next prime is 73665959. The reversal of 73665947 is 74956637.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73665947 - 2⁴ = 73665931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73665937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13928 + ... + 18474.

It is an arithmetic number, because the mean of its divisors is an integer number (9762282).

Almost surely, 2^73665947 is an apocalyptic number.

73665947 is a deficient number, since it is larger than the sum of its proper divisors (4432309).

73665947 is a wasteful number, since it uses less digits than its factorization.

73665947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517.

The product of its digits is 952560, while the sum is 47.

The square root of 73665947 is about 8582.8868686474. The cubic root of 73665947 is about 419.2009505392.

The spelling of 73665947 in words is "seventy-three million, six hundred sixty-five thousand, nine hundred forty-seven".