945542161 has 2 divisors, whose sum is σ = 945542162. Its totient is φ = 945542160.

The previous prime is 945542153. The next prime is 945542177. The reversal of 945542161 is 161245549.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705911761 + 239630400 = 26569^2 + 15480^2 .

It is an emirp because it is prime and its reverse (161245549) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 945542161 - 2³ = 945542153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 945542161.

It is not a weakly prime, because it can be changed into another prime (945542111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472771080 + 472771081.

It is an arithmetic number, because the mean of its divisors is an integer number (472771081).

Almost surely, 2^945542161 is an apocalyptic number.

It is an amenable number.

945542161 is a deficient number, since it is larger than the sum of its proper divisors (1).

945542161 is an equidigital number, since it uses as much as digits as its factorization.

945542161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 945542161 is about 30749.6692827744. The cubic root of 945542161 is about 981.5075232724.

The spelling of 945542161 in words is "nine hundred forty-five million, five hundred forty-two thousand, one hundred sixty-one".