1822738769 has 4 divisors (see below), whose sum is σ = 1885591860. Its totient is φ = 1759885680.

The previous prime is 1822738721. The next prime is 1822738811. The reversal of 1822738769 is 9678372281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9678372281 = 3581 ⋅2702701.

It can be written as a sum of positive squares in 2 ways, for example, as 1161991744 + 660747025 = 34088^2 + 25705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1822738769 is a prime.

It is a super-2 number, since 2×1822738769² = 6644753240031270722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1822738769.

It is not an unprimeable number, because it can be changed into a prime (1822738469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31426502 + ... + 31426559.

It is an arithmetic number, because the mean of its divisors is an integer number (471397965).

Almost surely, 2^1822738769 is an apocalyptic number.

It is an amenable number.

1822738769 is a deficient number, since it is larger than the sum of its proper divisors (62853091).

1822738769 is an equidigital number, since it uses as much as digits as its factorization.

1822738769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62853090.

The product of its digits is 2032128, while the sum is 53.

The square root of 1822738769 is about 42693.5448165176. The cubic root of 1822738769 is about 1221.5412682478.

The spelling of 1822738769 in words is "one billion, eight hundred twenty-two million, seven hundred thirty-eight thousand, seven hundred sixty-nine".