1899479045 has 8 divisors (see below), whose sum is σ = 2284322040. Its totient is φ = 1516285120.

The previous prime is 1899478991. The next prime is 1899479051. The reversal of 1899479045 is 5409749981.

It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 1899477889 = 34^2 + 43583^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1899479045 is a prime.

It is a super-2 number, since 2×1899479045² = 7216041284788224050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409730 + ... + 414339.

It is an arithmetic number, because the mean of its divisors is an integer number (285540255).

Almost surely, 2^1899479045 is an apocalyptic number.

It is an amenable number.

1899479045 is a deficient number, since it is larger than the sum of its proper divisors (384842995).

1899479045 is an equidigital number, since it uses as much as digits as its factorization.

1899479045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824535.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 1899479045 is about 43583.0132620497. The cubic root of 1899479045 is about 1238.4491201181.

The spelling of 1899479045 in words is "one billion, eight hundred ninety-nine million, four hundred seventy-nine thousand, forty-five".