1772938009 has 2 divisors, whose sum is σ = 1772938010. Its totient is φ = 1772938008.

The previous prime is 1772938001. The next prime is 1772938039. The reversal of 1772938009 is 9008392771.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1293984784 + 478953225 = 35972^2 + 21885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1772938009 - 2³ = 1772938001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1772938009.

It is not a weakly prime, because it can be changed into another prime (1772938001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 886469004 + 886469005.

It is an arithmetic number, because the mean of its divisors is an integer number (886469005).

Almost surely, 2^1772938009 is an apocalyptic number.

It is an amenable number.

1772938009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1772938009 is an equidigital number, since it uses as much as digits as its factorization.

1772938009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 1772938009 is about 42106.2704237742. The cubic root of 1772938009 is about 1210.3134240324.

The spelling of 1772938009 in words is "one billion, seven hundred seventy-two million, nine hundred thirty-eight thousand, nine".