86436961 has 4 divisors (see below), whose sum is σ = 93085972. Its totient is φ = 79787952.

The previous prime is 86436953. The next prime is 86436971. The reversal of 86436961 is 16963468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6155361 + 80281600 = 2481^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 86436961 - 2³ = 86436953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86436971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324486 + ... + 3324511.

It is an arithmetic number, because the mean of its divisors is an integer number (23271493).

Almost surely, 2^86436961 is an apocalyptic number.

It is an amenable number.

86436961 is a deficient number, since it is larger than the sum of its proper divisors (6649011).

86436961 is a wasteful number, since it uses less digits than its factorization.

86436961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649010.

The product of its digits is 186624, while the sum is 43.

The square root of 86436961 is about 9297.1480035546. The cubic root of 86436961 is about 442.1468104276.

It can be divided in two parts, 86436 and 961, that multiplied together give a square (83064996 = 9114²).

The spelling of 86436961 in words is "eighty-six million, four hundred thirty-six thousand, nine hundred sixty-one".