87769523 has 4 divisors (see below), whose sum is σ = 87826080. Its totient is φ = 87712968.

The previous prime is 87769501. The next prime is 87769543. The reversal of 87769523 is 32596778.

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 87769523 - 2⁸ = 87769267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87769543) 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, 25883 + ... + 29076.

It is an arithmetic number, because the mean of its divisors is an integer number (21956520).

Almost surely, 2^87769523 is an apocalyptic number.

87769523 is a deficient number, since it is larger than the sum of its proper divisors (56557).

87769523 is a wasteful number, since it uses less digits than its factorization.

87769523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56556.

The product of its digits is 635040, while the sum is 47.

The square root of 87769523 is about 9368.5390002924. The cubic root of 87769523 is about 444.4073632651.

The spelling of 87769523 in words is "eighty-seven million, seven hundred sixty-nine thousand, five hundred twenty-three".