1971916972 has 24 divisors (see below), whose sum is σ = 3674988576. Its totient is φ = 922591488.

The previous prime is 1971916963. The next prime is 1971916987. The reversal of 1971916972 is 2796191791.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 72048 + ... + 95575.

It is an arithmetic number, because the mean of its divisors is an integer number (153124524).

Almost surely, 2^1971916972 is an apocalyptic number.

It is an amenable number.

1971916972 is a deficient number, since it is larger than the sum of its proper divisors (1703071604).

1971916972 is a wasteful number, since it uses less digits than its factorization.

1971916972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167817 (or 167815 counting only the distinct ones).

The product of its digits is 428652, while the sum is 52.

The square root of 1971916972 is about 44406.2717642452. The cubic root of 1971916972 is about 1253.9961649452.

The spelling of 1971916972 in words is "one billion, nine hundred seventy-one million, nine hundred sixteen thousand, nine hundred seventy-two".