1940254109 has 2 divisors, whose sum is σ = 1940254110. Its totient is φ = 1940254108.

The previous prime is 1940254097. The next prime is 1940254207. The reversal of 1940254109 is 9014520491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1866672025 + 73582084 = 43205^2 + 8578^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940254109 - 2²⁰ = 1939205533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940254709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970127054 + 970127055.

It is an arithmetic number, because the mean of its divisors is an integer number (970127055).

Almost surely, 2^1940254109 is an apocalyptic number.

It is an amenable number.

1940254109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940254109 is an equidigital number, since it uses as much as digits as its factorization.

1940254109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1940254109 is about 44048.3156204639. The cubic root of 1940254109 is about 1247.2481562504.

The spelling of 1940254109 in words is "one billion, nine hundred forty million, two hundred fifty-four thousand, one hundred nine".