87934009 has 4 divisors (see below), whose sum is σ = 88007716. Its totient is φ = 87860304.

The previous prime is 87933983. The next prime is 87934019. The reversal of 87934009 is 90043978.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27793984 + 60140025 = 5272^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 87934009 - 2⁵ = 87933977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87934019) 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, 35034 + ... + 37459.

It is an arithmetic number, because the mean of its divisors is an integer number (22001929).

Almost surely, 2^87934009 is an apocalyptic number.

It is an amenable number.

87934009 is a deficient number, since it is larger than the sum of its proper divisors (73707).

87934009 is a wasteful number, since it uses less digits than its factorization.

87934009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73706.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 87934009 is about 9377.3135278714. The cubic root of 87934009 is about 444.6848064691.

The spelling of 87934009 in words is "eighty-seven million, nine hundred thirty-four thousand, nine".