87819377 has 4 divisors (see below), whose sum is σ = 87928740. Its totient is φ = 87710016.

The previous prime is 87819371. The next prime is 87819383. The reversal of 87819377 is 77391878.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87819371) and next prime (87819383).

It can be written as a sum of positive squares in 2 ways, for example, as 64625521 + 23193856 = 8039^2 + 4816^2 .

It is a cyclic number.

It is not a de Polignac number, because 87819377 - 2¹⁴ = 87802993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87819371) 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, 53468 + ... + 55085.

It is an arithmetic number, because the mean of its divisors is an integer number (21982185).

Almost surely, 2^87819377 is an apocalyptic number.

It is an amenable number.

87819377 is a deficient number, since it is larger than the sum of its proper divisors (109363).

87819377 is a wasteful number, since it uses less digits than its factorization.

87819377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109362.

The product of its digits is 592704, while the sum is 50.

The square root of 87819377 is about 9371.1993362643. The cubic root of 87819377 is about 444.4914900037.

The spelling of 87819377 in words is "eighty-seven million, eight hundred nineteen thousand, three hundred seventy-seven".