1089940837 has 2 divisors, whose sum is σ = 1089940838. Its totient is φ = 1089940836.

The previous prime is 1089940769. The next prime is 1089940847. The reversal of 1089940837 is 7380499801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089924196 + 16641 = 33014^2 + 129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089940837 - 2²³ = 1081552229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089940847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544970418 + 544970419.

It is an arithmetic number, because the mean of its divisors is an integer number (544970419).

Almost surely, 2^1089940837 is an apocalyptic number.

It is an amenable number.

1089940837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089940837 is an equidigital number, since it uses as much as digits as its factorization.

1089940837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1089940837 is about 33014.2520284801. The cubic root of 1089940837 is about 1029.1238463093.

The spelling of 1089940837 in words is "one billion, eighty-nine million, nine hundred forty thousand, eight hundred thirty-seven".