9149857 has 2 divisors, whose sum is σ = 9149858. Its totient is φ = 9149856.

The previous prime is 9149851. The next prime is 9149869. The reversal of 9149857 is 7589419.

9149857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 1089936 = 2839^2 + 1044^2 .

It is a cyclic number.

It is not a de Polignac number, because 9149857 - 2⁷ = 9149729 is a prime.

9149857 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9149851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4574928 + 4574929.

It is an arithmetic number, because the mean of its divisors is an integer number (4574929).

Almost surely, 2^9149857 is an apocalyptic number.

It is an amenable number.

9149857 is a deficient number, since it is larger than the sum of its proper divisors (1).

9149857 is an equidigital number, since it uses as much as digits as its factorization.

9149857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 9149857 is about 3024.8730551876. The cubic root of 9149857 is about 209.1565336029.

The spelling of 9149857 in words is "nine million, one hundred forty-nine thousand, eight hundred fifty-seven".