67749273 has 6 divisors (see below), whose sum is σ = 97860074. Its totient is φ = 45166176.

The previous prime is 67749271. The next prime is 67749289. The reversal of 67749273 is 37294776.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48274704 + 19474569 = 6948^2 + 4413^2 .

It is not a de Polignac number, because 67749273 - 2¹ = 67749271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67749271) 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, 3763840 + ... + 3763857.

Almost surely, 2^67749273 is an apocalyptic number.

It is an amenable number.

67749273 is a deficient number, since it is larger than the sum of its proper divisors (30110801).

67749273 is a wasteful number, since it uses less digits than its factorization.

67749273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7527703 (or 7527700 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 67749273 is about 8230.9946543537. The cubic root of 67749273 is about 407.6632349407.

The spelling of 67749273 in words is "sixty-seven million, seven hundred forty-nine thousand, two hundred seventy-three".