1921913914 has 4 divisors (see below), whose sum is σ = 2882870874. Its totient is φ = 960956956.

The previous prime is 1921913893. The next prime is 1921913947. The reversal of 1921913914 is 4193191291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1711228689 + 210685225 = 41367^2 + 14515^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480478477 + ... + 480478480.

Almost surely, 2^1921913914 is an apocalyptic number.

1921913914 is a deficient number, since it is larger than the sum of its proper divisors (960956960).

1921913914 is an equidigital number, since it uses as much as digits as its factorization.

1921913914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960956959.

The product of its digits is 17496, while the sum is 40.

The square root of 1921913914 is about 43839.6386162112. The cubic root of 1921913914 is about 1243.3058496625.

It can be divided in two parts, 19219 and 13914, that added together give a palindrome (33133).

The spelling of 1921913914 in words is "one billion, nine hundred twenty-one million, nine hundred thirteen thousand, nine hundred fourteen".