87810697 has 4 divisors (see below), whose sum is σ = 94565380. Its totient is φ = 81056016.

The previous prime is 87810691. The next prime is 87810707. The reversal of 87810697 is 79601878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79601878 = 2 ⋅39800939.

It can be written as a sum of positive squares in 2 ways, for example, as 48108096 + 39702601 = 6936^2 + 6301^2 .

It is a cyclic number.

It is not a de Polignac number, because 87810697 - 2³ = 87810689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87810691) 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, 3377322 + ... + 3377347.

It is an arithmetic number, because the mean of its divisors is an integer number (23641345).

Almost surely, 2^87810697 is an apocalyptic number.

It is an amenable number.

87810697 is a deficient number, since it is larger than the sum of its proper divisors (6754683).

87810697 is a wasteful number, since it uses less digits than its factorization.

87810697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6754682.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 87810697 is about 9370.7362037355. The cubic root of 87810697 is about 444.4768451217.

The spelling of 87810697 in words is "eighty-seven million, eight hundred ten thousand, six hundred ninety-seven".