9975457 has 2 divisors, whose sum is σ = 9975458. Its totient is φ = 9975456.

The previous prime is 9975451. The next prime is 9975461. The reversal of 9975457 is 7545799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9928801 + 46656 = 3151^2 + 216^2 .

It is an emirp because it is prime and its reverse (7545799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9975457 - 2¹¹ = 9973409 is a prime.

It is an Ulam number.

9975457 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9975451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987728 + 4987729.

It is an arithmetic number, because the mean of its divisors is an integer number (4987729).

Almost surely, 2^9975457 is an apocalyptic number.

9975457 is the 1824-th hex number.

It is an amenable number.

9975457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975457 is an equidigital number, since it uses as much as digits as its factorization.

9975457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 46.

The square root of 9975457 is about 3158.3946871789. The cubic root of 9975457 is about 215.2670703106.

The spelling of 9975457 in words is "nine million, nine hundred seventy-five thousand, four hundred fifty-seven".