1985419743 has 16 divisors (see below), whose sum is σ = 2683663200. Its totient is φ = 1305469440.

The previous prime is 1985419739. The next prime is 1985419753. The reversal of 1985419743 is 3479145891.

It is not a de Polignac number, because 1985419743 - 2² = 1985419739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985419753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100113 + ... + 118293.

It is an arithmetic number, because the mean of its divisors is an integer number (167728950).

Almost surely, 2^1985419743 is an apocalyptic number.

1985419743 is a deficient number, since it is larger than the sum of its proper divisors (698243457).

1985419743 is a wasteful number, since it uses less digits than its factorization.

1985419743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682.

The product of its digits is 1088640, while the sum is 51.

The square root of 1985419743 is about 44558.0491381748. The cubic root of 1985419743 is about 1256.8519175273.

The spelling of 1985419743 in words is "one billion, nine hundred eighty-five million, four hundred nineteen thousand, seven hundred forty-three".