86162721 has 4 divisors (see below), whose sum is σ = 114883632. Its totient is φ = 57441812.

The previous prime is 86162719. The next prime is 86162729. The reversal of 86162721 is 12726168.

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 86162721 - 2¹ = 86162719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86162729) 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, 14360451 + ... + 14360456.

It is an arithmetic number, because the mean of its divisors is an integer number (28720908).

Almost surely, 2^86162721 is an apocalyptic number.

It is an amenable number.

86162721 is a deficient number, since it is larger than the sum of its proper divisors (28720911).

86162721 is a wasteful number, since it uses less digits than its factorization.

86162721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28720910.

The product of its digits is 8064, while the sum is 33.

The square root of 86162721 is about 9282.3876777476. The cubic root of 86162721 is about 441.6787128236.

Adding to 86162721 its reverse (12726168), we get a palindrome (98888889).

The spelling of 86162721 in words is "eighty-six million, one hundred sixty-two thousand, seven hundred twenty-one".