1985246919 has 12 divisors (see below), whose sum is σ = 2934267336. Its totient is φ = 1292718672.

The previous prime is 1985246903. The next prime is 1985246953. The reversal of 1985246919 is 9196425891.

It is not a de Polignac number, because 1985246919 - 2⁴ = 1985246903 is a prime.

It is a super-2 number, since 2×1985246919² = 7882410658797985122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985247919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2564532 + ... + 2565305.

It is an arithmetic number, because the mean of its divisors is an integer number (244522278).

Almost surely, 2^1985246919 is an apocalyptic number.

1985246919 is a deficient number, since it is larger than the sum of its proper divisors (949020417).

1985246919 is a wasteful number, since it uses less digits than its factorization.

1985246919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129886 (or 5129883 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 1985246919 is about 44556.1097830589. The cubic root of 1985246919 is about 1256.8154482484.

The spelling of 1985246919 in words is "one billion, nine hundred eighty-five million, two hundred forty-six thousand, nine hundred nineteen".