73148609 has 4 divisors (see below), whose sum is σ = 73176000. Its totient is φ = 73121220.

The previous prime is 73148599. The next prime is 73148627. The reversal of 73148609 is 90684137.

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: 90684137 = 17 ⋅5334361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73148609 is a prime.

It is a super-3 number, since 3×73148609³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73148659) 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, 9197 + ... + 15194.

It is an arithmetic number, because the mean of its divisors is an integer number (18294000).

Almost surely, 2^73148609 is an apocalyptic number.

It is an amenable number.

73148609 is a deficient number, since it is larger than the sum of its proper divisors (27391).

73148609 is a wasteful number, since it uses less digits than its factorization.

73148609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27390.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 73148609 is about 8552.6960076925. The cubic root of 73148609 is about 418.2173289702.

The spelling of 73148609 in words is "seventy-three million, one hundred forty-eight thousand, six hundred nine".