1838665147 has 4 divisors (see below), whose sum is σ = 2005816536. Its totient is φ = 1671513760.

The previous prime is 1838665097. The next prime is 1838665177. The reversal of 1838665147 is 7415668381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7415668381 = 11 ⋅674151671.

It is a cyclic number.

It is not a de Polignac number, because 1838665147 - 2⁷ = 1838665019 is a prime.

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 1838665147.

It is not an unprimeable number, because it can be changed into a prime (1838665177) 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, 83575678 + ... + 83575699.

It is an arithmetic number, because the mean of its divisors is an integer number (501454134).

Almost surely, 2^1838665147 is an apocalyptic number.

1838665147 is a deficient number, since it is larger than the sum of its proper divisors (167151389).

1838665147 is a wasteful number, since it uses less digits than its factorization.

1838665147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167151388.

The product of its digits is 967680, while the sum is 49.

The square root of 1838665147 is about 42879.6588955649. The cubic root of 1838665147 is about 1225.0887392608.

The spelling of 1838665147 in words is "one billion, eight hundred thirty-eight million, six hundred sixty-five thousand, one hundred forty-seven".