87208649 has 4 divisors (see below), whose sum is σ = 95136720. Its totient is φ = 79280580.

The previous prime is 87208643. The next prime is 87208669. The reversal of 87208649 is 94680278.

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 87208649 - 2¹² = 87204553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87208643) 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 3 ways as a sum of consecutive naturals, for example, 3964019 + ... + 3964040.

It is an arithmetic number, because the mean of its divisors is an integer number (23784180).

Almost surely, 2^87208649 is an apocalyptic number.

It is an amenable number.

87208649 is a deficient number, since it is larger than the sum of its proper divisors (7928071).

87208649 is a wasteful number, since it uses less digits than its factorization.

87208649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928070.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 87208649 is about 9338.5571155291. The cubic root of 87208649 is about 443.4587068231.

The spelling of 87208649 in words is "eighty-seven million, two hundred eight thousand, six hundred forty-nine".