86267989 has 2 divisors, whose sum is σ = 86267990. Its totient is φ = 86267988.

The previous prime is 86267981. The next prime is 86268041. The reversal of 86267989 is 98976268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67519089 + 18748900 = 8217^2 + 4330^2 .

It is a cyclic number.

It is not a de Polignac number, because 86267989 - 2³ = 86267981 is a prime.

It is a super-2 number, since 2×86267989² = 14884331852208242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86267981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43133994 + 43133995.

It is an arithmetic number, because the mean of its divisors is an integer number (43133995).

Almost surely, 2^86267989 is an apocalyptic number.

It is an amenable number.

86267989 is a deficient number, since it is larger than the sum of its proper divisors (1).

86267989 is an equidigital number, since it uses as much as digits as its factorization.

86267989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 86267989 is about 9288.0562552129. The cubic root of 86267989 is about 441.8585110486.

The spelling of 86267989 in words is "eighty-six million, two hundred sixty-seven thousand, nine hundred eighty-nine".