1992454447 has 4 divisors (see below), whose sum is σ = 1996776936. Its totient is φ = 1988131960.

The previous prime is 1992454433. The next prime is 1992454459. The reversal of 1992454447 is 7444542991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7444542991 = 29 ⋅256708379.

It is a cyclic number.

It is not a de Polignac number, because 1992454447 - 2⁷ = 1992454319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1992454447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992454487) 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 3 ways as a sum of consecutive naturals, for example, 2160553 + ... + 2161474.

It is an arithmetic number, because the mean of its divisors is an integer number (499194234).

Almost surely, 2^1992454447 is an apocalyptic number.

1992454447 is a deficient number, since it is larger than the sum of its proper divisors (4322489).

1992454447 is an equidigital number, since it uses as much as digits as its factorization.

1992454447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322488.

The product of its digits is 1451520, while the sum is 49.

The square root of 1992454447 is about 44636.9179827640. The cubic root of 1992454447 is about 1258.3345862518.

The spelling of 1992454447 in words is "one billion, nine hundred ninety-two million, four hundred fifty-four thousand, four hundred forty-seven".