1838166797 has 4 divisors (see below), whose sum is σ = 1838252736. Its totient is φ = 1838080860.

The previous prime is 1838166773. The next prime is 1838166809. The reversal of 1838166797 is 7976618381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1838166797 - 2⁸ = 1838166541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838166727) 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, 17198 + ... + 63024.

It is an arithmetic number, because the mean of its divisors is an integer number (459563184).

Almost surely, 2^1838166797 is an apocalyptic number.

It is an amenable number.

1838166797 is a deficient number, since it is larger than the sum of its proper divisors (85939).

1838166797 is an equidigital number, since it uses as much as digits as its factorization.

1838166797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85938.

The product of its digits is 3048192, while the sum is 56.

The square root of 1838166797 is about 42873.8474713898. The cubic root of 1838166797 is about 1224.9780469757.

The spelling of 1838166797 in words is "one billion, eight hundred thirty-eight million, one hundred sixty-six thousand, seven hundred ninety-seven".