1992907747 has 4 divisors (see below), whose sum is σ = 1993440280. Its totient is φ = 1992375216.

The previous prime is 1992907711. The next prime is 1992907793. The reversal of 1992907747 is 7477092991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1992907747 - 2⁷ = 1992907619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992907547) by changing a digit.

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, 260613 + ... + 268150.

It is an arithmetic number, because the mean of its divisors is an integer number (498360070).

Almost surely, 2^1992907747 is an apocalyptic number.

1992907747 is a deficient number, since it is larger than the sum of its proper divisors (532533).

1992907747 is an equidigital number, since it uses as much as digits as its factorization.

1992907747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532532.

The product of its (nonzero) digits is 2000376, while the sum is 55.

The square root of 1992907747 is about 44641.9953295101. The cubic root of 1992907747 is about 1258.4300062194.

The spelling of 1992907747 in words is "one billion, nine hundred ninety-two million, nine hundred seven thousand, seven hundred forty-seven".