1819094147 has 4 divisors (see below), whose sum is σ = 1959024480. Its totient is φ = 1679163816.

The previous prime is 1819094111. The next prime is 1819094149. The reversal of 1819094147 is 7414909181.

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: 7414909181 = 659 ⋅11251759.

It is a cyclic number.

It is not a de Polignac number, because 1819094147 - 2¹² = 1819090051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1819094098 and 1819094107.

It is not an unprimeable number, because it can be changed into a prime (1819094149) 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, 69965147 + ... + 69965172.

It is an arithmetic number, because the mean of its divisors is an integer number (489756120).

Almost surely, 2^1819094147 is an apocalyptic number.

1819094147 is a deficient number, since it is larger than the sum of its proper divisors (139930333).

1819094147 is a wasteful number, since it uses less digits than its factorization.

1819094147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139930332.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1819094147 is about 42650.8399331127. The cubic root of 1819094147 is about 1220.7265552643.

The spelling of 1819094147 in words is "one billion, eight hundred nineteen million, ninety-four thousand, one hundred forty-seven".