87292009 has 4 divisors (see below), whose sum is σ = 99762304. Its totient is φ = 74821716.

The previous prime is 87291979. The next prime is 87292031. The reversal of 87292009 is 90029278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87292009 - 2¹⁹ = 86767721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87292039) 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, 6235137 + ... + 6235150.

It is an arithmetic number, because the mean of its divisors is an integer number (24940576).

Almost surely, 2^87292009 is an apocalyptic number.

It is an amenable number.

87292009 is a deficient number, since it is larger than the sum of its proper divisors (12470295).

87292009 is a wasteful number, since it uses less digits than its factorization.

87292009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12470294.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 87292009 is about 9343.0192657406. The cubic root of 87292009 is about 443.5999578957.

The spelling of 87292009 in words is "eighty-seven million, two hundred ninety-two thousand, nine".