91558601 has 2 divisors, whose sum is σ = 91558602. Its totient is φ = 91558600.

The previous prime is 91558543. The next prime is 91558627. The reversal of 91558601 is 10685519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46936201 + 44622400 = 6851^2 + 6680^2 .

It is a cyclic number.

It is not a de Polignac number, because 91558601 - 2²² = 87364297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91558631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45779300 + 45779301.

It is an arithmetic number, because the mean of its divisors is an integer number (45779301).

Almost surely, 2^91558601 is an apocalyptic number.

It is an amenable number.

91558601 is a deficient number, since it is larger than the sum of its proper divisors (1).

91558601 is an equidigital number, since it uses as much as digits as its factorization.

91558601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 91558601 is about 9568.6258679081. The cubic root of 91558601 is about 450.7126174095.

The spelling of 91558601 in words is "ninety-one million, five hundred fifty-eight thousand, six hundred one".