86909121 has 24 divisors (see below), whose sum is σ = 135838976. Its totient is φ = 53226720.

The previous prime is 86909099. The next prime is 86909129. The reversal of 86909121 is 12190968.

It is not a de Polignac number, because 86909121 - 2⁶ = 86909057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86909129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24426 + ... + 27756.

Almost surely, 2^86909121 is an apocalyptic number.

It is an amenable number.

86909121 is a deficient number, since it is larger than the sum of its proper divisors (48929855).

86909121 is a wasteful number, since it uses less digits than its factorization.

86909121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573 (or 3570 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 86909121 is about 9322.5061544630. The cubic root of 86909121 is about 442.9504213752.

The spelling of 86909121 in words is "eighty-six million, nine hundred nine thousand, one hundred twenty-one".