9915457 has 2 divisors, whose sum is σ = 9915458. Its totient is φ = 9915456.

The previous prime is 9915427. The next prime is 9915467. The reversal of 9915457 is 7545199.

9915457 is digitally balanced in base 3, because in such base 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., 9431041 + 484416 = 3071^2 + 696^2 .

It is a cyclic number.

It is not a de Polignac number, because 9915457 - 2⁷ = 9915329 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9915407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4957728 + 4957729.

It is an arithmetic number, because the mean of its divisors is an integer number (4957729).

Almost surely, 2^9915457 is an apocalyptic number.

It is an amenable number.

9915457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9915457 is an equidigital number, since it uses as much as digits as its factorization.

9915457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 9915457 is about 3148.8818650435. The cubic root of 9915457 is about 214.8346086967.

The spelling of 9915457 in words is "nine million, nine hundred fifteen thousand, four hundred fifty-seven".