1891482969 has 4 divisors (see below), whose sum is σ = 2521977296. Its totient is φ = 1260988644.

The previous prime is 1891482959. The next prime is 1891482991. The reversal of 1891482969 is 9692841981.

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.

It is not a de Polignac number, because 1891482969 - 2⁷ = 1891482841 is a prime.

It is a super-2 number, since 2×1891482969² = 7155415644034109922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1891482919) 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, 315247159 + ... + 315247164.

It is an arithmetic number, because the mean of its divisors is an integer number (630494324).

Almost surely, 2^1891482969 is an apocalyptic number.

It is an amenable number.

1891482969 is a deficient number, since it is larger than the sum of its proper divisors (630494327).

1891482969 is an equidigital number, since it uses as much as digits as its factorization.

1891482969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630494326.

The product of its digits is 2239488, while the sum is 57.

The square root of 1891482969 is about 43491.1826580975. The cubic root of 1891482969 is about 1236.7088778014.

The spelling of 1891482969 in words is "one billion, eight hundred ninety-one million, four hundred eighty-two thousand, nine hundred sixty-nine".