1490475893 has 4 divisors (see below), whose sum is σ = 1490553900. Its totient is φ = 1490397888.

The previous prime is 1490475823. The next prime is 1490475913. The reversal of 1490475893 is 3985740941.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 366416164 + 1124059729 = 19142^2 + 33527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490475893 - 2³⁰ = 416734069 is a prime.

It is a super-3 number, since 3×1490475893³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490475823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11183 + ... + 55731.

It is an arithmetic number, because the mean of its divisors is an integer number (372638475).

Almost surely, 2^1490475893 is an apocalyptic number.

It is an amenable number.

1490475893 is a deficient number, since it is larger than the sum of its proper divisors (78007).

1490475893 is an equidigital number, since it uses as much as digits as its factorization.

1490475893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78006.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1490475893 is about 38606.6819734615. The cubic root of 1490475893 is about 1142.2863453947.

The spelling of 1490475893 in words is "one billion, four hundred ninety million, four hundred seventy-five thousand, eight hundred ninety-three".