1981963262 has 8 divisors (see below), whose sum is σ = 2973335256. Its totient is φ = 990851512.

The previous prime is 1981963259. The next prime is 1981963271. The reversal of 1981963262 is 2623691891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44753 + ... + 77244.

It is an arithmetic number, because the mean of its divisors is an integer number (371666907).

Almost surely, 2^1981963262 is an apocalyptic number.

1981963262 is a deficient number, since it is larger than the sum of its proper divisors (991371994).

1981963262 is a wasteful number, since it uses less digits than its factorization.

1981963262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130122.

The product of its digits is 279936, while the sum is 47.

The square root of 1981963262 is about 44519.2459729497. The cubic root of 1981963262 is about 1256.1221292354.

The spelling of 1981963262 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-three thousand, two hundred sixty-two".