1899995049 has 40 divisors (see below), whose sum is σ = 2883009888. Its totient is φ = 1246864320.

The previous prime is 1899994979. The next prime is 1899995093. The reversal of 1899995049 is 9405999981.

It is a de Polignac number, because none of the positive numbers 2^k-1899995049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1899995749) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1453054 + ... + 1454360.

Almost surely, 2^1899995049 is an apocalyptic number.

It is an amenable number.

1899995049 is a deficient number, since it is larger than the sum of its proper divisors (983014839).

1899995049 is a wasteful number, since it uses less digits than its factorization.

1899995049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 63.

The square root of 1899995049 is about 43588.9326435048. The cubic root of 1899995049 is about 1238.5612538183.

The spelling of 1899995049 in words is "one billion, eight hundred ninety-nine million, nine hundred ninety-five thousand, forty-nine".