86101921 has 2 divisors, whose sum is σ = 86101922. Its totient is φ = 86101920.

The previous prime is 86101907. The next prime is 86101943. The reversal of 86101921 is 12910168.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83174400 + 2927521 = 9120^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 86101921 - 2²³ = 77713313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86101921.

It is not a weakly prime, because it can be changed into another prime (86101021) 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, 43050960 + 43050961.

It is an arithmetic number, because the mean of its divisors is an integer number (43050961).

Almost surely, 2^86101921 is an apocalyptic number.

It is an amenable number.

86101921 is a deficient number, since it is larger than the sum of its proper divisors (1).

86101921 is an equidigital number, since it uses as much as digits as its factorization.

86101921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 86101921 is about 9279.1120803663. The cubic root of 86101921 is about 441.5747994206.

The spelling of 86101921 in words is "eighty-six million, one hundred one thousand, nine hundred twenty-one".