1772493649 has 2 divisors, whose sum is σ = 1772493650. Its totient is φ = 1772493648.

The previous prime is 1772493637. The next prime is 1772493703. The reversal of 1772493649 is 9463942771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903423249 + 869070400 = 30057^2 + 29480^2 .

It is an emirp because it is prime and its reverse (9463942771) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1772493649 - 2⁵ = 1772493617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1772493596 and 1772493605.

It is not a weakly prime, because it can be changed into another prime (1772491649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 886246824 + 886246825.

It is an arithmetic number, because the mean of its divisors is an integer number (886246825).

Almost surely, 2^1772493649 is an apocalyptic number.

It is an amenable number.

1772493649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1772493649 is an equidigital number, since it uses as much as digits as its factorization.

1772493649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 52.

The square root of 1772493649 is about 42100.9934443357. The cubic root of 1772493649 is about 1210.2123000209.

The spelling of 1772493649 in words is "one billion, seven hundred seventy-two million, four hundred ninety-three thousand, six hundred forty-nine".