1838166773 has 2 divisors, whose sum is σ = 1838166774. Its totient is φ = 1838166772.

The previous prime is 1838166767. The next prime is 1838166809. The reversal of 1838166773 is 3776618381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1455651409 + 382515364 = 38153^2 + 19558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838166773 is a prime.

It is a super-2 number, since 2×1838166773² = 6757714170722467058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838166763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919083386 + 919083387.

It is an arithmetic number, because the mean of its divisors is an integer number (919083387).

Almost surely, 2^1838166773 is an apocalyptic number.

It is an amenable number.

1838166773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838166773 is an equidigital number, since it uses as much as digits as its factorization.

1838166773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 1838166773 is about 42873.8471914989. The cubic root of 1838166773 is about 1224.9780416444.

The spelling of 1838166773 in words is "one billion, eight hundred thirty-eight million, one hundred sixty-six thousand, seven hundred seventy-three".