906478193 has 2 divisors, whose sum is σ = 906478194. Its totient is φ = 906478192.

The previous prime is 906478189. The next prime is 906478241. The reversal of 906478193 is 391874609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745999969 + 160478224 = 27313^2 + 12668^2 .

It is a cyclic number.

It is not a de Polignac number, because 906478193 - 2² = 906478189 is a prime.

It is not a weakly prime, because it can be changed into another prime (906478393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453239096 + 453239097.

It is an arithmetic number, because the mean of its divisors is an integer number (453239097).

Almost surely, 2^906478193 is an apocalyptic number.

It is an amenable number.

906478193 is a deficient number, since it is larger than the sum of its proper divisors (1).

906478193 is an equidigital number, since it uses as much as digits as its factorization.

906478193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 906478193 is about 30107.7762878629. The cubic root of 906478193 is about 967.8003769684.

The spelling of 906478193 in words is "nine hundred six million, four hundred seventy-eight thousand, one hundred ninety-three".