88509609 has 12 divisors (see below), whose sum is σ = 130820976. Its totient is φ = 57633912.

The previous prime is 88509583. The next prime is 88509649. The reversal of 88509609 is 90690588.

88509609 is a `hidden beast` number, since 88 + 509 + 60 + 9 = 666.

It is not a de Polignac number, because 88509609 - 2¹² = 88505513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88509649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113967 + ... + 114740.

It is an arithmetic number, because the mean of its divisors is an integer number (10901748).

Almost surely, 2^88509609 is an apocalyptic number.

It is an amenable number.

88509609 is a deficient number, since it is larger than the sum of its proper divisors (42311367).

88509609 is a wasteful number, since it uses less digits than its factorization.

88509609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228756 (or 228753 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 88509609 is about 9407.9545598392. The cubic root of 88509609 is about 445.6529722912.

The spelling of 88509609 in words is "eighty-eight million, five hundred nine thousand, six hundred nine".