87678757 has 6 divisors (see below), whose sum is σ = 90599334. Its totient is φ = 84849480.

The previous prime is 87678751. The next prime is 87678769. The reversal of 87678757 is 75787678.

It can be written as a sum of positive squares in only one way, i.e., 52620516 + 35058241 = 7254^2 + 5921^2 .

It is not a de Polignac number, because 87678757 - 2¹¹ = 87676709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87678698 and 87678707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87678751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44658 + ... + 46579.

It is an arithmetic number, because the mean of its divisors is an integer number (15099889).

Almost surely, 2^87678757 is an apocalyptic number.

It is an amenable number.

87678757 is a deficient number, since it is larger than the sum of its proper divisors (2920577).

87678757 is an equidigital number, since it uses as much as digits as its factorization.

87678757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91299 (or 91268 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 55.

The square root of 87678757 is about 9363.6935554299. The cubic root of 87678757 is about 444.2541172404.

The spelling of 87678757 in words is "eighty-seven million, six hundred seventy-eight thousand, seven hundred fifty-seven".