1991974962 has 16 divisors (see below), whose sum is σ = 4068715392. Its totient is φ = 649864080.

The previous prime is 1991974951. The next prime is 1991974969. The reversal of 1991974962 is 2694791991.

It is not an unprimeable number, because it can be changed into a prime (1991974969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3531589 + ... + 3532152.

It is an arithmetic number, because the mean of its divisors is an integer number (254294712).

Almost surely, 2^1991974962 is an apocalyptic number.

1991974962 is an abundant number, since it is smaller than the sum of its proper divisors (2076740430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1991974962 is a wasteful number, since it uses less digits than its factorization.

1991974962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7063793.

The product of its digits is 2204496, while the sum is 57.

The square root of 1991974962 is about 44631.5467130594. The cubic root of 1991974962 is about 1258.2336385713.

The spelling of 1991974962 in words is "one billion, nine hundred ninety-one million, nine hundred seventy-four thousand, nine hundred sixty-two".