77881363 has 4 divisors (see below), whose sum is σ = 89007280. Its totient is φ = 66755448.

The previous prime is 77881339. The next prime is 77881367. The reversal of 77881363 is 36318877.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36318877 = 7 ⋅5188411.

It is a cyclic number.

It is not a de Polignac number, because 77881363 - 2⁹ = 77880851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77881367) 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, 5562948 + ... + 5562961.

It is an arithmetic number, because the mean of its divisors is an integer number (22251820).

Almost surely, 2^77881363 is an apocalyptic number.

77881363 is a deficient number, since it is larger than the sum of its proper divisors (11125917).

77881363 is a wasteful number, since it uses less digits than its factorization.

77881363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125916.

The product of its digits is 169344, while the sum is 43.

The square root of 77881363 is about 8825.0418129321. The cubic root of 77881363 is about 427.0491362812.

The spelling of 77881363 in words is "seventy-seven million, eight hundred eighty-one thousand, three hundred sixty-three".