91229093 has 2 divisors, whose sum is σ = 91229094. Its totient is φ = 91229092.

The previous prime is 91229071. The next prime is 91229111. The reversal of 91229093 is 39092219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76352644 + 14876449 = 8738^2 + 3857^2 .

It is an emirp because it is prime and its reverse (39092219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91229093 - 2¹² = 91224997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91229893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45614546 + 45614547.

It is an arithmetic number, because the mean of its divisors is an integer number (45614547).

Almost surely, 2^91229093 is an apocalyptic number.

It is an amenable number.

91229093 is a deficient number, since it is larger than the sum of its proper divisors (1).

91229093 is an equidigital number, since it uses as much as digits as its factorization.

91229093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 91229093 is about 9551.3922021871. The cubic root of 91229093 is about 450.1712812998.

The spelling of 91229093 in words is "ninety-one million, two hundred twenty-nine thousand, ninety-three".