86220409 has 4 divisors (see below), whose sum is σ = 94058640. Its totient is φ = 78382180.

The previous prime is 86220403. The next prime is 86220437. The reversal of 86220409 is 90402268.

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 86220409 - 2⁵ = 86220377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86220403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3919099 + ... + 3919120.

It is an arithmetic number, because the mean of its divisors is an integer number (23514660).

Almost surely, 2^86220409 is an apocalyptic number.

It is an amenable number.

86220409 is a deficient number, since it is larger than the sum of its proper divisors (7838231).

86220409 is a wasteful number, since it uses less digits than its factorization.

86220409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7838230.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 86220409 is about 9285.4945479495. The cubic root of 86220409 is about 441.7772623162. Note that the first 3 decimals are identical.

The spelling of 86220409 in words is "eighty-six million, two hundred twenty thousand, four hundred nine".