73043749 has 4 divisors (see below), whose sum is σ = 73183936. Its totient is φ = 72903564.

The previous prime is 73043743. The next prime is 73043753. The reversal of 73043749 is 94734037.

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: 94734037 = 61 ⋅1553017.

It is a cyclic number.

It is not a de Polignac number, because 73043749 - 2³ = 73043741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73043741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69309 + ... + 70354.

It is an arithmetic number, because the mean of its divisors is an integer number (18295984).

Almost surely, 2^73043749 is an apocalyptic number.

It is an amenable number.

73043749 is a deficient number, since it is larger than the sum of its proper divisors (140187).

73043749 is a wasteful number, since it uses less digits than its factorization.

73043749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140186.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 73043749 is about 8546.5635784214. The cubic root of 73043749 is about 418.0173924221.

The spelling of 73043749 in words is "seventy-three million, forty-three thousand, seven hundred forty-nine".