86481869 has 2 divisors, whose sum is σ = 86481870. Its totient is φ = 86481868.

The previous prime is 86481841. The next prime is 86481883. The reversal of 86481869 is 96818468.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85784644 + 697225 = 9262^2 + 835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86481869 is a prime.

It is a super-2 number, since 2×86481869² = 14958227331466322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86481809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43240934 + 43240935.

It is an arithmetic number, because the mean of its divisors is an integer number (43240935).

Almost surely, 2^86481869 is an apocalyptic number.

It is an amenable number.

86481869 is a deficient number, since it is larger than the sum of its proper divisors (1).

86481869 is an equidigital number, since it uses as much as digits as its factorization.

86481869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 50.

The square root of 86481869 is about 9299.5628391877. The cubic root of 86481869 is about 442.2233690781.

The spelling of 86481869 in words is "eighty-six million, four hundred eighty-one thousand, eight hundred sixty-nine".