86921099 has 2 divisors, whose sum is σ = 86921100. Its totient is φ = 86921098.

The previous prime is 86921059. The next prime is 86921141. The reversal of 86921099 is 99012968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86921099 - 2²⁴ = 70143883 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86921059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43460549 + 43460550.

It is an arithmetic number, because the mean of its divisors is an integer number (43460550).

Almost surely, 2^86921099 is an apocalyptic number.

86921099 is a deficient number, since it is larger than the sum of its proper divisors (1).

86921099 is an equidigital number, since it uses as much as digits as its factorization.

86921099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 86921099 is about 9323.1485561478. The cubic root of 86921099 is about 442.9707698970.

The spelling of 86921099 in words is "eighty-six million, nine hundred twenty-one thousand, ninety-nine".