77283385 has 4 divisors (see below), whose sum is σ = 92740068. Its totient is φ = 61826704.

The previous prime is 77283383. The next prime is 77283397. The reversal of 77283385 is 58338277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58338277 = 167 ⋅349331.

It can be written as a sum of positive squares in 2 ways, for example, as 29452329 + 47831056 = 5427^2 + 6916^2 .

It is a cyclic number.

It is not a de Polignac number, because 77283385 - 2¹ = 77283383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77283383) 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, 7728334 + ... + 7728343.

It is an arithmetic number, because the mean of its divisors is an integer number (23185017).

Almost surely, 2^77283385 is an apocalyptic number.

It is an amenable number.

77283385 is a deficient number, since it is larger than the sum of its proper divisors (15456683).

77283385 is a wasteful number, since it uses less digits than its factorization.

77283385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15456682.

The product of its digits is 282240, while the sum is 43.

The square root of 77283385 is about 8791.0969167676. The cubic root of 77283385 is about 425.9533569539.

The spelling of 77283385 in words is "seventy-seven million, two hundred eighty-three thousand, three hundred eighty-five".