86758821 has 48 divisors (see below), whose sum is σ = 135110976. Its totient is φ = 53561088.

The previous prime is 86758799. The next prime is 86758823. The reversal of 86758821 is 12885768.

86758821 is a `hidden beast` number, since 8 + 67 + 588 + 2 + 1 = 666.

It is not a de Polignac number, because 86758821 - 2¹⁴ = 86742437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86758823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1045246 + ... + 1045328.

It is an arithmetic number, because the mean of its divisors is an integer number (2814812).

Almost surely, 2^86758821 is an apocalyptic number.

It is an amenable number.

86758821 is a deficient number, since it is larger than the sum of its proper divisors (48352155).

86758821 is a wasteful number, since it uses less digits than its factorization.

86758821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 239 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 86758821 is about 9314.4415291525. The cubic root of 86758821 is about 442.6949289603.

The spelling of 86758821 in words is "eighty-six million, seven hundred fifty-eight thousand, eight hundred twenty-one".