1985223903 has 12 divisors (see below), whose sum is σ = 2866241160. Its totient is φ = 1221675936.

The previous prime is 1985223901. The next prime is 1985223907. The reversal of 1985223903 is 3093225891.

It is not a de Polignac number, because 1985223903 - 2¹ = 1985223901 is a prime.

It is a super-2 number, since 2×1985223903² = 7882227890085106818, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985223901) 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, 1957308 + ... + 1958321.

It is an arithmetic number, because the mean of its divisors is an integer number (238853430).

Almost surely, 2^1985223903 is an apocalyptic number.

1985223903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1985223903 is a deficient number, since it is larger than the sum of its proper divisors (881017257).

1985223903 is a wasteful number, since it uses less digits than its factorization.

1985223903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915658 (or 3915645 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1985223903 is about 44555.8515012338. The cubic root of 1985223903 is about 1256.8105912580.

The spelling of 1985223903 in words is "one billion, nine hundred eighty-five million, two hundred twenty-three thousand, nine hundred three".