1985154683 has 4 divisors (see below), whose sum is σ = 1985350440. Its totient is φ = 1984958928.

The previous prime is 1985154643. The next prime is 1985154707. The reversal of 1985154683 is 3864515891.

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

It is a cyclic number.

It is not a de Polignac number, because 1985154683 - 2⁸ = 1985154427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985154643) 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, 81785 + ... + 103242.

It is an arithmetic number, because the mean of its divisors is an integer number (496337610).

Almost surely, 2^1985154683 is an apocalyptic number.

1985154683 is a deficient number, since it is larger than the sum of its proper divisors (195757).

1985154683 is a wasteful number, since it uses less digits than its factorization.

1985154683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195756.

The product of its digits is 1036800, while the sum is 50.

The square root of 1985154683 is about 44555.0747165797. The cubic root of 1985154683 is about 1256.7959837637.

The spelling of 1985154683 in words is "one billion, nine hundred eighty-five million, one hundred fifty-four thousand, six hundred eighty-three".