87689769 has 16 divisors (see below), whose sum is σ = 123360000. Its totient is φ = 55254096.

The previous prime is 87689761. The next prime is 87689809. The reversal of 87689769 is 96798678.

It is not a de Polignac number, because 87689769 - 2³ = 87689761 is a prime.

It is a super-2 number, since 2×87689769² = 15378991174546722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87689761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26902 + ... + 29984.

It is an arithmetic number, because the mean of its divisors is an integer number (7710000).

Almost surely, 2^87689769 is an apocalyptic number.

It is an amenable number.

87689769 is a deficient number, since it is larger than the sum of its proper divisors (35670231).

87689769 is a wasteful number, since it uses less digits than its factorization.

87689769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604.

The product of its digits is 9144576, while the sum is 60.

The square root of 87689769 is about 9364.2815527941. The cubic root of 87689769 is about 444.2727151377.

The spelling of 87689769 in words is "eighty-seven million, six hundred eighty-nine thousand, seven hundred sixty-nine".