9901457 has 2 divisors, whose sum is σ = 9901458. Its totient is φ = 9901456.

The previous prime is 9901433. The next prime is 9901543. The reversal of 9901457 is 7541099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8667136 + 1234321 = 2944^2 + 1111^2 .

It is an emirp because it is prime and its reverse (7541099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9901457 - 2⁶ = 9901393 is a prime.

It is not a weakly prime, because it can be changed into another prime (9901427) 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, 4950728 + 4950729.

It is an arithmetic number, because the mean of its divisors is an integer number (4950729).

Almost surely, 2^9901457 is an apocalyptic number.

It is an amenable number.

9901457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901457 is an equidigital number, since it uses as much as digits as its factorization.

9901457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 9901457 is about 3146.6580684911. The cubic root of 9901457 is about 214.7334500986.

The spelling of 9901457 in words is "nine million, nine hundred one thousand, four hundred fifty-seven".