1782064789 has 2 divisors, whose sum is σ = 1782064790. Its totient is φ = 1782064788.

The previous prime is 1782064769. The next prime is 1782064799. The reversal of 1782064789 is 9874602871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1781684100 + 380689 = 42210^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1782064789 - 2²⁹ = 1245193877 is a prime.

It is a super-2 number, since 2×1782064789² = 6351509824387229042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1782064709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891032394 + 891032395.

It is an arithmetic number, because the mean of its divisors is an integer number (891032395).

Almost surely, 2^1782064789 is an apocalyptic number.

It is an amenable number.

1782064789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1782064789 is an equidigital number, since it uses as much as digits as its factorization.

1782064789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The square root of 1782064789 is about 42214.5092237254. The cubic root of 1782064789 is about 1212.3866989323.

The spelling of 1782064789 in words is "one billion, seven hundred eighty-two million, sixty-four thousand, seven hundred eighty-nine".