906249161 has 2 divisors, whose sum is σ = 906249162. Its totient is φ = 906249160.

The previous prime is 906249131. The next prime is 906249163. The reversal of 906249161 is 161942609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814759936 + 91489225 = 28544^2 + 9565^2 .

It is a cyclic number.

It is not a de Polignac number, because 906249161 - 2¹⁴ = 906232777 is a prime.

It is a Sophie Germain prime.

Together with 906249163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (906249163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453124580 + 453124581.

It is an arithmetic number, because the mean of its divisors is an integer number (453124581).

Almost surely, 2^906249161 is an apocalyptic number.

It is an amenable number.

906249161 is a deficient number, since it is larger than the sum of its proper divisors (1).

906249161 is an equidigital number, since it uses as much as digits as its factorization.

906249161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 906249161 is about 30103.9725119460. The cubic root of 906249161 is about 967.7188615209.

The spelling of 906249161 in words is "nine hundred six million, two hundred forty-nine thousand, one hundred sixty-one".