86977789 has 4 divisors (see below), whose sum is σ = 90759456. Its totient is φ = 83196124.

The previous prime is 86977783. The next prime is 86977817. The reversal of 86977789 is 98777968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86977789 - 2¹⁹ = 86453501 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 (86977783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1890799 + ... + 1890844.

It is an arithmetic number, because the mean of its divisors is an integer number (22689864).

Almost surely, 2^86977789 is an apocalyptic number.

It is an amenable number.

86977789 is a deficient number, since it is larger than the sum of its proper divisors (3781667).

86977789 is a wasteful number, since it uses less digits than its factorization.

86977789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781666.

The product of its digits is 10668672, while the sum is 61.

The square root of 86977789 is about 9326.1883425116. The cubic root of 86977789 is about 443.0670509145.

The spelling of 86977789 in words is "eighty-six million, nine hundred seventy-seven thousand, seven hundred eighty-nine".