9945457 has 2 divisors, whose sum is σ = 9945458. Its totient is φ = 9945456.

The previous prime is 9945449. The next prime is 9945461. The reversal of 9945457 is 7545499.

It is a happy number.

9945457 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8503056 + 1442401 = 2916^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 9945457 - 2³ = 9945449 is a prime.

It is a super-2 number, since 2×9945457² = 197824229877698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9945157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972728 + 4972729.

It is an arithmetic number, because the mean of its divisors is an integer number (4972729).

Almost surely, 2^9945457 is an apocalyptic number.

It is an amenable number.

9945457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945457 is an equidigital number, since it uses as much as digits as its factorization.

9945457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 43.

The square root of 9945457 is about 3153.6418629895. The cubic root of 9945457 is about 215.0510569207.

The spelling of 9945457 in words is "nine million, nine hundred forty-five thousand, four hundred fifty-seven".