1915921983 has 16 divisors (see below), whose sum is σ = 2594465280. Its totient is φ = 1257424896.

The previous prime is 1915921979. The next prime is 1915922009. The reversal of 1915921983 is 3891295191.

It is not a de Polignac number, because 1915921983 - 2² = 1915921979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915921933) 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 15 ways as a sum of consecutive naturals, for example, 70591 + ... + 93887.

It is an arithmetic number, because the mean of its divisors is an integer number (162154080).

Almost surely, 2^1915921983 is an apocalyptic number.

1915921983 is a deficient number, since it is larger than the sum of its proper divisors (678543297).

1915921983 is a wasteful number, since it uses less digits than its factorization.

1915921983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23726.

The product of its digits is 174960, while the sum is 48.

The square root of 1915921983 is about 43771.2460754774. The cubic root of 1915921983 is about 1242.0124239956.

The spelling of 1915921983 in words is "one billion, nine hundred fifteen million, nine hundred twenty-one thousand, nine hundred eighty-three".