73169749 has 4 divisors (see below), whose sum is σ = 73217164. Its totient is φ = 73122336.

The previous prime is 73169731. The next prime is 73169771. The reversal of 73169749 is 94796137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94796137 = 9511 ⋅9967.

It can be written as a sum of positive squares in 2 ways, for example, as 41190724 + 31979025 = 6418^2 + 5655^2 .

It is a cyclic number.

It is not a de Polignac number, because 73169749 - 2¹⁵ = 73136981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73169699 and 73169708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73169249) 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, 21312 + ... + 24505.

It is an arithmetic number, because the mean of its divisors is an integer number (18304291).

Almost surely, 2^73169749 is an apocalyptic number.

It is an amenable number.

73169749 is a deficient number, since it is larger than the sum of its proper divisors (47415).

73169749 is a wasteful number, since it uses less digits than its factorization.

73169749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47414.

The product of its digits is 285768, while the sum is 46.

The square root of 73169749 is about 8553.9317860268. The cubic root of 73169749 is about 418.2576134581.

The spelling of 73169749 in words is "seventy-three million, one hundred sixty-nine thousand, seven hundred forty-nine".