940981109 has 2 divisors, whose sum is σ = 940981110. Its totient is φ = 940981108.

The previous prime is 940981079. The next prime is 940981121. The reversal of 940981109 is 901189049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587917009 + 353064100 = 24247^2 + 18790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940981109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940981199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470490554 + 470490555.

It is an arithmetic number, because the mean of its divisors is an integer number (470490555).

Almost surely, 2^940981109 is an apocalyptic number.

It is an amenable number.

940981109 is a deficient number, since it is larger than the sum of its proper divisors (1).

940981109 is an equidigital number, since it uses as much as digits as its factorization.

940981109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 940981109 is about 30675.4153843106. The cubic root of 940981109 is about 979.9267989889.

The spelling of 940981109 in words is "nine hundred forty million, nine hundred eighty-one thousand, one hundred nine".