1921114513 has 4 divisors (see below), whose sum is σ = 1923405120. Its totient is φ = 1918823908.

The previous prime is 1921114499. The next prime is 1921114523. The reversal of 1921114513 is 3154111291.

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 a cyclic number.

It is not a de Polignac number, because 1921114513 - 2⁹ = 1921114001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921114523) 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, 1144045 + ... + 1145722.

It is an arithmetic number, because the mean of its divisors is an integer number (480851280).

Almost surely, 2^1921114513 is an apocalyptic number.

It is an amenable number.

1921114513 is a deficient number, since it is larger than the sum of its proper divisors (2290607).

1921114513 is an equidigital number, since it uses as much as digits as its factorization.

1921114513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290606.

The product of its digits is 1080, while the sum is 28.

The square root of 1921114513 is about 43830.5203368612. The cubic root of 1921114513 is about 1243.1334455181.

The spelling of 1921114513 in words is "one billion, nine hundred twenty-one million, one hundred fourteen thousand, five hundred thirteen".