87689409 has 8 divisors (see below), whose sum is σ = 122002752. Its totient is φ = 55917840.

The previous prime is 87689387. The next prime is 87689423. The reversal of 87689409 is 90498678.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87689409 - 2⁹ = 87688897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87689429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635362 + ... + 635499.

It is an arithmetic number, because the mean of its divisors is an integer number (15250344).

Almost surely, 2^87689409 is an apocalyptic number.

It is an amenable number.

87689409 is a deficient number, since it is larger than the sum of its proper divisors (34313343).

87689409 is a wasteful number, since it uses less digits than its factorization.

87689409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270887.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 87689409 is about 9364.2623307979. The cubic root of 87689409 is about 444.2721071671.

The spelling of 87689409 in words is "eighty-seven million, six hundred eighty-nine thousand, four hundred nine".