91395229 has 2 divisors, whose sum is σ = 91395230. Its totient is φ = 91395228.

The previous prime is 91395209. The next prime is 91395277. The reversal of 91395229 is 92259319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73102500 + 18292729 = 8550^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 91395229 - 2¹⁷ = 91264157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91395191 and 91395200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91395209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45697614 + 45697615.

It is an arithmetic number, because the mean of its divisors is an integer number (45697615).

Almost surely, 2^91395229 is an apocalyptic number.

It is an amenable number.

91395229 is a deficient number, since it is larger than the sum of its proper divisors (1).

91395229 is an equidigital number, since it uses as much as digits as its factorization.

91395229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 40.

The square root of 91395229 is about 9560.0851983651. The cubic root of 91395229 is about 450.4443824198. Note that the first 3 decimals are identical.

The spelling of 91395229 in words is "ninety-one million, three hundred ninety-five thousand, two hundred twenty-nine".