87678811 has 4 divisors (see below), whose sum is σ = 95649624. Its totient is φ = 79708000.

The previous prime is 87678781. The next prime is 87678817. The reversal of 87678811 is 11887678.

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

It is a cyclic number.

It is not a de Polignac number, because 87678811 - 2²¹ = 85581659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87678817) 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, 3985390 + ... + 3985411.

It is an arithmetic number, because the mean of its divisors is an integer number (23912406).

Almost surely, 2^87678811 is an apocalyptic number.

87678811 is a deficient number, since it is larger than the sum of its proper divisors (7970813).

87678811 is a wasteful number, since it uses less digits than its factorization.

87678811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7970812.

The product of its digits is 150528, while the sum is 46.

The square root of 87678811 is about 9363.6964389070. The cubic root of 87678811 is about 444.2542084435.

It can be divided in two parts, 8767 and 8811, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 87678811 in words is "eighty-seven million, six hundred seventy-eight thousand, eight hundred eleven".