91449601 has 2 divisors, whose sum is σ = 91449602. Its totient is φ = 91449600.

The previous prime is 91449593. The next prime is 91449637. The reversal of 91449601 is 10694419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73977201 + 17472400 = 8601^2 + 4180^2 .

It is an emirp because it is prime and its reverse (10694419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91449601 - 2³ = 91449593 is a prime.

It is not a weakly prime, because it can be changed into another prime (91449671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45724800 + 45724801.

It is an arithmetic number, because the mean of its divisors is an integer number (45724801).

Almost surely, 2^91449601 is an apocalyptic number.

It is an amenable number.

91449601 is a deficient number, since it is larger than the sum of its proper divisors (1).

91449601 is an equidigital number, since it uses as much as digits as its factorization.

91449601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 91449601 is about 9562.9284740607. The cubic root of 91449601 is about 450.5336894404.

The spelling of 91449601 in words is "ninety-one million, four hundred forty-nine thousand, six hundred one".