87765011 has 4 divisors (see below), whose sum is σ = 88077624. Its totient is φ = 87452400.

The previous prime is 87764993. The next prime is 87765019. The reversal of 87765011 is 11056778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11056778 = 2 ⋅5528389.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87765011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87765019) 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, 155885 + ... + 156446.

It is an arithmetic number, because the mean of its divisors is an integer number (22019406).

Almost surely, 2^87765011 is an apocalyptic number.

87765011 is a deficient number, since it is larger than the sum of its proper divisors (312613).

87765011 is a wasteful number, since it uses less digits than its factorization.

87765011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312612.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 87765011 is about 9368.2981912405. The cubic root of 87765011 is about 444.3997478639.

The spelling of 87765011 in words is "eighty-seven million, seven hundred sixty-five thousand, eleven".