1945206869 has 2 divisors, whose sum is σ = 1945206870. Its totient is φ = 1945206868.

The previous prime is 1945206751. The next prime is 1945206877. The reversal of 1945206869 is 9686025491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1565151844 + 380055025 = 39562^2 + 19495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945206869 - 2¹⁶ = 1945141333 is a prime.

It is a super-2 number, since 2×1945206869² = 7567659526409566322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945206889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972603434 + 972603435.

It is an arithmetic number, because the mean of its divisors is an integer number (972603435).

Almost surely, 2^1945206869 is an apocalyptic number.

It is an amenable number.

1945206869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945206869 is an equidigital number, since it uses as much as digits as its factorization.

1945206869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 1945206869 is about 44104.4994189935. The cubic root of 1945206869 is about 1248.3085108440.

The spelling of 1945206869 in words is "one billion, nine hundred forty-five million, two hundred six thousand, eight hundred sixty-nine".