1929489481 has 4 divisors (see below), whose sum is σ = 2013380352. Its totient is φ = 1845598612.

The previous prime is 1929489461. The next prime is 1929489491. The reversal of 1929489481 is 1849849291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1849849291 = 19 ⋅97360489.

It is a cyclic number.

It is not a de Polignac number, because 1929489481 - 2¹³ = 1929481289 is a prime.

It is a super-2 number, since 2×1929489481² = 7445859314579298722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1929489461) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 41945401 + ... + 41945446.

It is an arithmetic number, because the mean of its divisors is an integer number (503345088).

Almost surely, 2^1929489481 is an apocalyptic number.

It is an amenable number.

1929489481 is a deficient number, since it is larger than the sum of its proper divisors (83890871).

1929489481 is an equidigital number, since it uses as much as digits as its factorization.

1929489481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83890870.

The product of its digits is 1492992, while the sum is 55.

The square root of 1929489481 is about 43925.9545257698. The cubic root of 1929489481 is about 1244.9372787120.

The spelling of 1929489481 in words is "one billion, nine hundred twenty-nine million, four hundred eighty-nine thousand, four hundred eighty-one".