538660777 has 4 divisors (see below), whose sum is σ = 542276100. Its totient is φ = 535045456.

The previous prime is 538660769. The next prime is 538660813. The reversal of 538660777 is 777066835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777066835 = 5 ⋅155413367.

It can be written as a sum of positive squares in 2 ways, for example, as 330839721 + 207821056 = 18189^2 + 14416^2 .

It is a cyclic number.

It is not a de Polignac number, because 538660777 - 2³ = 538660769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 538660777.

It is not an unprimeable number, because it can be changed into a prime (538660477) 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, 1807438 + ... + 1807735.

It is an arithmetic number, because the mean of its divisors is an integer number (135569025).

Almost surely, 2^538660777 is an apocalyptic number.

It is an amenable number.

538660777 is a deficient number, since it is larger than the sum of its proper divisors (3615323).

538660777 is a wasteful number, since it uses less digits than its factorization.

538660777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615322.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The square root of 538660777 is about 23209.0666981678. The cubic root of 538660777 is about 813.6515405692.

The spelling of 538660777 in words is "five hundred thirty-eight million, six hundred sixty thousand, seven hundred seventy-seven".