77530273 has 4 divisors (see below), whose sum is σ = 77646148. Its totient is φ = 77414400.

The previous prime is 77530267. The next prime is 77530291. The reversal of 77530273 is 37203577.

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 10093329 + 67436944 = 3177^2 + 8212^2 .

It is a cyclic number.

It is not a de Polignac number, because 77530273 - 2⁹ = 77529761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77530073) 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 3 ways as a sum of consecutive naturals, for example, 56928 + ... + 58273.

It is an arithmetic number, because the mean of its divisors is an integer number (19411537).

Almost surely, 2^77530273 is an apocalyptic number.

It is an amenable number.

77530273 is a deficient number, since it is larger than the sum of its proper divisors (115875).

77530273 is a wasteful number, since it uses less digits than its factorization.

77530273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115874.

The product of its (nonzero) digits is 30870, while the sum is 34.

The square root of 77530273 is about 8805.1276538163. The cubic root of 77530273 is about 426.4064555816.

The spelling of 77530273 in words is "seventy-seven million, five hundred thirty thousand, two hundred seventy-three".