1994923825 has 18 divisors (see below), whose sum is σ = 2501966166. Its totient is φ = 1577744640.

The previous prime is 1994923793. The next prime is 1994923831. The reversal of 1994923825 is 5283294991.

It can be written as a sum of positive squares in 3 ways, for example, as 99540529 + 1895383296 = 9977^2 + 43536^2 .

It is not a de Polignac number, because 1994923825 - 2⁵ = 1994923793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 2199022 + ... + 2199928.

Almost surely, 2^1994923825 is an apocalyptic number.

It is an amenable number.

1994923825 is a deficient number, since it is larger than the sum of its proper divisors (507042341).

1994923825 is an frugal number, since it uses more digits than its factorization.

1994923825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1009 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 52.

The square root of 1994923825 is about 44664.5701311453. The cubic root of 1994923825 is about 1258.8542168574.

The spelling of 1994923825 in words is "one billion, nine hundred ninety-four million, nine hundred twenty-three thousand, eight hundred twenty-five".