86189531 has 2 divisors, whose sum is σ = 86189532. Its totient is φ = 86189530.

The previous prime is 86189471. The next prime is 86189549. The reversal of 86189531 is 13598168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86189531 - 2¹⁴ = 86173147 is a prime.

It is a super-2 number, since 2×86189531² = 14857270507999922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86189561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43094765 + 43094766.

It is an arithmetic number, because the mean of its divisors is an integer number (43094766).

Almost surely, 2^86189531 is an apocalyptic number.

86189531 is a deficient number, since it is larger than the sum of its proper divisors (1).

86189531 is an equidigital number, since it uses as much as digits as its factorization.

86189531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 41.

The square root of 86189531 is about 9283.8316981729. The cubic root of 86189531 is about 441.7245183189.

The spelling of 86189531 in words is "eighty-six million, one hundred eighty-nine thousand, five hundred thirty-one".