91230871 has 2 divisors, whose sum is σ = 91230872. Its totient is φ = 91230870.

The previous prime is 91230851. The next prime is 91230877. The reversal of 91230871 is 17803219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91230871 - 2⁷ = 91230743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91230877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45615435 + 45615436.

It is an arithmetic number, because the mean of its divisors is an integer number (45615436).

Almost surely, 2^91230871 is an apocalyptic number.

91230871 is a deficient number, since it is larger than the sum of its proper divisors (1).

91230871 is an equidigital number, since it uses as much as digits as its factorization.

91230871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 91230871 is about 9551.4852771702. The cubic root of 91230871 is about 450.1742058031.

The spelling of 91230871 in words is "ninety-one million, two hundred thirty thousand, eight hundred seventy-one".