1985847601 has 4 divisors (see below), whose sum is σ = 1997739072. Its totient is φ = 1973956132.

The previous prime is 1985847599. The next prime is 1985847607. The reversal of 1985847601 is 1067485891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1985847601 - 2¹ = 1985847599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985847607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5945485 + ... + 5945818.

It is an arithmetic number, because the mean of its divisors is an integer number (499434768).

Almost surely, 2^1985847601 is an apocalyptic number.

It is an amenable number.

1985847601 is a deficient number, since it is larger than the sum of its proper divisors (11891471).

1985847601 is a wasteful number, since it uses less digits than its factorization.

1985847601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891470.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 1985847601 is about 44562.8500098456. The cubic root of 1985847601 is about 1256.9421949150.

The spelling of 1985847601 in words is "one billion, nine hundred eighty-five million, eight hundred forty-seven thousand, six hundred one".