87767647 has 4 divisors (see below), whose sum is σ = 95746536. Its totient is φ = 79788760.

The previous prime is 87767623. The next prime is 87767689. The reversal of 87767647 is 74676778.

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 87767647 - 2¹⁵ = 87734879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87767594 and 87767603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87764647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3989428 + ... + 3989449.

It is an arithmetic number, because the mean of its divisors is an integer number (23936634).

Almost surely, 2^87767647 is an apocalyptic number.

87767647 is a deficient number, since it is larger than the sum of its proper divisors (7978889).

87767647 is a wasteful number, since it uses less digits than its factorization.

87767647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978888.

The product of its digits is 2765952, while the sum is 52.

The square root of 87767647 is about 9368.4388774224. The cubic root of 87767647 is about 444.4041969642.

The spelling of 87767647 in words is "eighty-seven million, seven hundred sixty-seven thousand, six hundred forty-seven".