945492109 has 2 divisors, whose sum is σ = 945492110. Its totient is φ = 945492108.

The previous prime is 945492083. The next prime is 945492137. The reversal of 945492109 is 901294549.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771172900 + 174319209 = 27770^2 + 13203^2 .

It is a cyclic number.

It is not a de Polignac number, because 945492109 - 2¹¹ = 945490061 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945496109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472746054 + 472746055.

It is an arithmetic number, because the mean of its divisors is an integer number (472746055).

Almost surely, 2^945492109 is an apocalyptic number.

It is an amenable number.

945492109 is a deficient number, since it is larger than the sum of its proper divisors (1).

945492109 is an equidigital number, since it uses as much as digits as its factorization.

945492109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 945492109 is about 30748.8554095921. The cubic root of 945492109 is about 981.4902043614.

The spelling of 945492109 in words is "nine hundred forty-five million, four hundred ninety-two thousand, one hundred nine".