1992465785 has 4 divisors (see below), whose sum is σ = 2390958948. Its totient is φ = 1593972624.

The previous prime is 1992465751. The next prime is 1992465791. The reversal of 1992465785 is 5875642991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1484098576 + 508367209 = 38524^2 + 22547^2 .

It is a cyclic number.

It is not a de Polignac number, because 1992465785 - 2⁶ = 1992465721 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 1992465785.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199246574 + ... + 199246583.

It is an arithmetic number, because the mean of its divisors is an integer number (597739737).

Almost surely, 2^1992465785 is an apocalyptic number.

It is an amenable number.

1992465785 is a deficient number, since it is larger than the sum of its proper divisors (398493163).

1992465785 is an equidigital number, since it uses as much as digits as its factorization.

1992465785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398493162.

The product of its digits is 5443200, while the sum is 56.

The square root of 1992465785 is about 44637.0449850794. The cubic root of 1992465785 is about 1258.3369730852.

The spelling of 1992465785 in words is "one billion, nine hundred ninety-two million, four hundred sixty-five thousand, seven hundred eighty-five".