77285893 has 4 divisors (see below), whose sum is σ = 81832140. Its totient is φ = 72739648.

The previous prime is 77285891. The next prime is 77285941. The reversal of 77285893 is 39858277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39858277 = 409 ⋅97453.

It can be written as a sum of positive squares in 2 ways, for example, as 37368769 + 39917124 = 6113^2 + 6318^2 .

It is a cyclic number.

It is not a de Polignac number, because 77285893 - 2¹ = 77285891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77285891) 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, 2273098 + ... + 2273131.

It is an arithmetic number, because the mean of its divisors is an integer number (20458035).

Almost surely, 2^77285893 is an apocalyptic number.

It is an amenable number.

77285893 is a deficient number, since it is larger than the sum of its proper divisors (4546247).

77285893 is a wasteful number, since it uses less digits than its factorization.

77285893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546246.

The product of its digits is 846720, while the sum is 49.

The square root of 77285893 is about 8791.2395599256. The cubic root of 77285893 is about 425.9579645828.

The spelling of 77285893 in words is "seventy-seven million, two hundred eighty-five thousand, eight hundred ninety-three".