91470097 has 2 divisors, whose sum is σ = 91470098. Its totient is φ = 91470096.

The previous prime is 91470083. The next prime is 91470107. The reversal of 91470097 is 79007419.

It is a Cunningham number, because it is equal to 9564²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91470096 + 1 = 9564^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 91470097 - 2¹¹ = 91468049 is a prime.

It is not a weakly prime, because it can be changed into another prime (91470007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45735048 + 45735049.

It is an arithmetic number, because the mean of its divisors is an integer number (45735049).

Almost surely, 2^91470097 is an apocalyptic number.

It is an amenable number.

91470097 is a deficient number, since it is larger than the sum of its proper divisors (1).

91470097 is an equidigital number, since it uses as much as digits as its factorization.

91470097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 91470097 is about 9564.0000522794. Note that the first 4 decimals coincide. The cubic root of 91470097 is about 450.5673453143.

The spelling of 91470097 in words is "ninety-one million, four hundred seventy thousand, ninety-seven".