73240643 has 6 divisors (see below), whose sum is σ = 85198356. Its totient is φ = 62777652.

The previous prime is 73240621. The next prime is 73240691. The reversal of 73240643 is 34604237.

It is a happy number.

It is not a de Polignac number, because 73240643 - 2¹² = 73236547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73240603) 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 5 ways as a sum of consecutive naturals, for example, 747305 + ... + 747402.

It is an arithmetic number, because the mean of its divisors is an integer number (14199726).

Almost surely, 2^73240643 is an apocalyptic number.

73240643 is a deficient number, since it is larger than the sum of its proper divisors (11957713).

73240643 is a wasteful number, since it uses less digits than its factorization.

73240643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494721 (or 1494714 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 73240643 is about 8558.0747250769. The cubic root of 73240643 is about 418.3926527981.

The spelling of 73240643 in words is "seventy-three million, two hundred forty thousand, six hundred forty-three".