1985504947 has 8 divisors (see below), whose sum is σ = 2005560000. Its totient is φ = 1965477864.

The previous prime is 1985504903. The next prime is 1985504977. The reversal of 1985504947 is 7494055891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1985504947 - 2⁷ = 1985504819 is a prime.

It is a super-2 number, since 2×1985504947² = 7884459789122945618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1985504894 and 1985504903.

It is not an unprimeable number, because it can be changed into a prime (1985504977) 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 7 ways as a sum of consecutive naturals, for example, 154204 + ... + 166582.

It is an arithmetic number, because the mean of its divisors is an integer number (250695000).

Almost surely, 2^1985504947 is an apocalyptic number.

1985504947 is a deficient number, since it is larger than the sum of its proper divisors (20055053).

1985504947 is a wasteful number, since it uses less digits than its factorization.

1985504947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13985.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The square root of 1985504947 is about 44559.0052290219. The cubic root of 1985504947 is about 1256.8698964759.

The spelling of 1985504947 in words is "one billion, nine hundred eighty-five million, five hundred four thousand, nine hundred forty-seven".