87419209 has 4 divisors (see below), whose sum is σ = 92020240. Its totient is φ = 82818180.

The previous prime is 87419191. The next prime is 87419239. The reversal of 87419209 is 90291478.

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 87419209 - 2⁵ = 87419177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87419239) 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, 2300487 + ... + 2300524.

It is an arithmetic number, because the mean of its divisors is an integer number (23005060).

Almost surely, 2^87419209 is an apocalyptic number.

It is an amenable number.

87419209 is a deficient number, since it is larger than the sum of its proper divisors (4601031).

87419209 is a wasteful number, since it uses less digits than its factorization.

87419209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601030.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 87419209 is about 9349.8240090389. The cubic root of 87419209 is about 443.8153213633.

The spelling of 87419209 in words is "eighty-seven million, four hundred nineteen thousand, two hundred nine".