1898799149 has 8 divisors (see below), whose sum is σ = 2045262240. Its totient is φ = 1752393456.

The previous prime is 1898799127. The next prime is 1898799151. The reversal of 1898799149 is 9419978981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1898799149 - 2²⁰ = 1897750573 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 (1898799349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75014 + ... + 97080.

It is an arithmetic number, because the mean of its divisors is an integer number (255657780).

Almost surely, 2^1898799149 is an apocalyptic number.

It is an amenable number.

1898799149 is a deficient number, since it is larger than the sum of its proper divisors (146463091).

1898799149 is a wasteful number, since it uses less digits than its factorization.

1898799149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28699.

The product of its digits is 11757312, while the sum is 65.

The square root of 1898799149 is about 43575.2125525510. The cubic root of 1898799149 is about 1238.3013397589.

The spelling of 1898799149 in words is "one billion, eight hundred ninety-eight million, seven hundred ninety-nine thousand, one hundred forty-nine".