87319409 has 8 divisors (see below), whose sum is σ = 88190400. Its totient is φ = 86453136.

The previous prime is 87319391. The next prime is 87319433. The reversal of 87319409 is 90491378.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87319409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87319489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44207 + ... + 46139.

It is an arithmetic number, because the mean of its divisors is an integer number (11023800).

Almost surely, 2^87319409 is an apocalyptic number.

It is an amenable number.

87319409 is a deficient number, since it is larger than the sum of its proper divisors (870991).

87319409 is a wasteful number, since it uses less digits than its factorization.

87319409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 87319409 is about 9344.4854861036. The cubic root of 87319409 is about 443.6463667536.

The spelling of 87319409 in words is "eighty-seven million, three hundred nineteen thousand, four hundred nine".