1899650473 has 6 divisors (see below), whose sum is σ = 2209797546. Its totient is φ = 1628271792.

The previous prime is 1899650429. The next prime is 1899650497. The reversal of 1899650473 is 3740569981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1895122089 + 4528384 = 43533^2 + 2128^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1899650473 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 1899650473.

It is not an unprimeable number, because it can be changed into a prime (1899650413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19384140 + ... + 19384237.

It is an arithmetic number, because the mean of its divisors is an integer number (368299591).

Almost surely, 2^1899650473 is an apocalyptic number.

It is an amenable number.

1899650473 is a deficient number, since it is larger than the sum of its proper divisors (310147073).

1899650473 is an equidigital number, since it uses as much as digits as its factorization.

1899650473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38768391 (or 38768384 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 1899650473 is about 43584.9799013376. The cubic root of 1899650473 is about 1238.4863756785.

The spelling of 1899650473 in words is "one billion, eight hundred ninety-nine million, six hundred fifty thousand, four hundred seventy-three".