1945109293 has 2 divisors, whose sum is σ = 1945109294. Its totient is φ = 1945109292.

The previous prime is 1945109273. The next prime is 1945109297. The reversal of 1945109293 is 3929015491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1748745124 + 196364169 = 41818^2 + 14013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945109293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945109297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972554646 + 972554647.

It is an arithmetic number, because the mean of its divisors is an integer number (972554647).

Almost surely, 2^1945109293 is an apocalyptic number.

It is an amenable number.

1945109293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945109293 is an equidigital number, since it uses as much as digits as its factorization.

1945109293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 1945109293 is about 44103.3932141281. The cubic root of 1945109293 is about 1248.2876378304.

The spelling of 1945109293 in words is "one billion, nine hundred forty-five million, one hundred nine thousand, two hundred ninety-three".