1921314776 has 32 divisors (see below), whose sum is σ = 3809393280. Its totient is φ = 906988800.

The previous prime is 1921314761. The next prime is 1921314779. The reversal of 1921314776 is 6774131291.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921314779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84311 + ... + 104646.

It is an arithmetic number, because the mean of its divisors is an integer number (119043540).

Almost surely, 2^1921314776 is an apocalyptic number.

It is an amenable number.

1921314776 is a deficient number, since it is larger than the sum of its proper divisors (1888078504).

1921314776 is a wasteful number, since it uses less digits than its factorization.

1921314776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189035 (or 189031 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The square root of 1921314776 is about 43832.8047927577. The cubic root of 1921314776 is about 1243.1766400598.

The spelling of 1921314776 in words is "one billion, nine hundred twenty-one million, three hundred fourteen thousand, seven hundred seventy-six".