73623665 has 4 divisors (see below), whose sum is σ = 88348404. Its totient is φ = 58898928.

The previous prime is 73623653. The next prime is 73623691. The reversal of 73623665 is 56632637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56632637 = 2137 ⋅26501.

It can be written as a sum of positive squares in 2 ways, for example, as 34586161 + 39037504 = 5881^2 + 6248^2 .

It is a cyclic number.

It is not a de Polignac number, because 73623665 - 2¹⁶ = 73558129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7362362 + ... + 7362371.

It is an arithmetic number, because the mean of its divisors is an integer number (22087101).

Almost surely, 2^73623665 is an apocalyptic number.

It is an amenable number.

73623665 is a deficient number, since it is larger than the sum of its proper divisors (14724739).

73623665 is a wasteful number, since it uses less digits than its factorization.

73623665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14724738.

The product of its digits is 136080, while the sum is 38.

The square root of 73623665 is about 8580.4233578536. The cubic root of 73623665 is about 419.1207323491.

The spelling of 73623665 in words is "seventy-three million, six hundred twenty-three thousand, six hundred sixty-five".