1871990049 has 8 divisors (see below), whose sum is σ = 2582055360. Its totient is φ = 1204959056.

The previous prime is 1871990023. The next prime is 1871990053. The reversal of 1871990049 is 9400991781.

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 1871990049 - 2¹³ = 1871981857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1871990009) 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, 10758477 + ... + 10758650.

It is an arithmetic number, because the mean of its divisors is an integer number (322756920).

Almost surely, 2^1871990049 is an apocalyptic number.

It is an amenable number.

1871990049 is a deficient number, since it is larger than the sum of its proper divisors (710065311).

1871990049 is a wasteful number, since it uses less digits than its factorization.

1871990049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21517159.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 1871990049 is about 43266.5003091306. The cubic root of 1871990049 is about 1232.4458457692.

The spelling of 1871990049 in words is "one billion, eight hundred seventy-one million, nine hundred ninety thousand, forty-nine".