73749289 has 4 divisors (see below), whose sum is σ = 73911124. Its totient is φ = 73587456.

The previous prime is 73749239. The next prime is 73749323. The reversal of 73749289 is 98294737.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69305625 + 4443664 = 8325^2 + 2108^2 .

It is a cyclic number.

It is not a de Polignac number, because 73749289 - 2⁹ = 73748777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73749209) 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, 80232 + ... + 81145.

It is an arithmetic number, because the mean of its divisors is an integer number (18477781).

Almost surely, 2^73749289 is an apocalyptic number.

It is an amenable number.

73749289 is a deficient number, since it is larger than the sum of its proper divisors (161835).

73749289 is a wasteful number, since it uses less digits than its factorization.

73749289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161834.

The product of its digits is 762048, while the sum is 49.

The square root of 73749289 is about 8587.7406225386. The cubic root of 73749289 is about 419.3589786827.

The spelling of 73749289 in words is "seventy-three million, seven hundred forty-nine thousand, two hundred eighty-nine".