91262089 has 2 divisors, whose sum is σ = 91262090. Its totient is φ = 91262088.

The previous prime is 91262071. The next prime is 91262099. The reversal of 91262089 is 98026219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62015625 + 29246464 = 7875^2 + 5408^2 .

It is a cyclic number.

It is not a de Polignac number, because 91262089 - 2⁵ = 91262057 is a prime.

It is not a weakly prime, because it can be changed into another prime (91262029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45631044 + 45631045.

It is an arithmetic number, because the mean of its divisors is an integer number (45631045).

Almost surely, 2^91262089 is an apocalyptic number.

It is an amenable number.

91262089 is a deficient number, since it is larger than the sum of its proper divisors (1).

91262089 is an equidigital number, since it uses as much as digits as its factorization.

91262089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 91262089 is about 9553.1193334952. The cubic root of 91262089 is about 450.2255478380.

It can be divided in two parts, 912 and 62089, that added together give a square (63001 = 251²).

The spelling of 91262089 in words is "ninety-one million, two hundred sixty-two thousand, eighty-nine".