86774530921 has 32 divisors (see below), whose sum is σ = 97376964608. Its totient is φ = 76814438400.

The previous prime is 86774530879. The next prime is 86774530933. The reversal of 86774530921 is 12903547768.

It is a 7-Lehmer number, since φ(86774530921) divides (86774530921-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 86774530921 - 2¹³ = 86774522729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86774530961) 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, 6880021 + ... + 6892621.

It is an arithmetic number, because the mean of its divisors is an integer number (3043030144).

It is a 2-persistent number, because it is pandigital, and so is 2⋅86774530921 = 173549061842, but 3⋅86774530921 = 260323592763 is not.

Almost surely, 2^86774530921 is an apocalyptic number.

It is an amenable number.

86774530921 is a deficient number, since it is larger than the sum of its proper divisors (10602433687).

86774530921 is a wasteful number, since it uses less digits than its factorization.

86774530921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12881.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 86774530921 in words is "eighty-six billion, seven hundred seventy-four million, five hundred thirty thousand, nine hundred twenty-one".