73051643 has 4 divisors (see below), whose sum is σ = 83487600. Its totient is φ = 62615688.

The previous prime is 73051621. The next prime is 73051651. The reversal of 73051643 is 34615037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34615037 = 89 ⋅388933.

It is a cyclic number.

It is not a de Polignac number, because 73051643 - 2⁸ = 73051387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73051613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5217968 + ... + 5217981.

It is an arithmetic number, because the mean of its divisors is an integer number (20871900).

Almost surely, 2^73051643 is an apocalyptic number.

73051643 is a deficient number, since it is larger than the sum of its proper divisors (10435957).

73051643 is a wasteful number, since it uses less digits than its factorization.

73051643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10435956.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 73051643 is about 8547.0253889877. The cubic root of 73051643 is about 418.0324505686.

The spelling of 73051643 in words is "seventy-three million, fifty-one thousand, six hundred forty-three".