87439065 has 32 divisors (see below), whose sum is σ = 165052416. Its totient is φ = 38681280.

The previous prime is 87439049. The next prime is 87439067. The reversal of 87439065 is 56093478.

It is a happy number.

It is not a de Polignac number, because 87439065 - 2⁴ = 87439049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87439067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10177 + ... + 16686.

It is an arithmetic number, because the mean of its divisors is an integer number (5157888).

Almost surely, 2^87439065 is an apocalyptic number.

It is an amenable number.

87439065 is a deficient number, since it is larger than the sum of its proper divisors (77613351).

87439065 is a wasteful number, since it uses less digits than its factorization.

87439065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26909.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 87439065 is about 9350.8857869188. The cubic root of 87439065 is about 443.8489208815.

The spelling of 87439065 in words is "eighty-seven million, four hundred thirty-nine thousand, sixty-five".