86661923 has 2 divisors, whose sum is σ = 86661924. Its totient is φ = 86661922.

The previous prime is 86661901. The next prime is 86661929. The reversal of 86661923 is 32916668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86661923 - 2⁶ = 86661859 is a prime.

It is not a weakly prime, because it can be changed into another prime (86661929) 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 as a sum of consecutive naturals, namely, 43330961 + 43330962.

It is an arithmetic number, because the mean of its divisors is an integer number (43330962).

Almost surely, 2^86661923 is an apocalyptic number.

86661923 is a deficient number, since it is larger than the sum of its proper divisors (1).

86661923 is an equidigital number, since it uses as much as digits as its factorization.

86661923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 86661923 is about 9309.2385832570. The cubic root of 86661923 is about 442.5300572218.

The spelling of 86661923 in words is "eighty-six million, six hundred sixty-one thousand, nine hundred twenty-three".