1996905 has 32 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 972800.

The previous prime is 1996903. The next prime is 1996933. The reversal of 1996905 is 5096991.

It is not a de Polignac number, because 1996905 - 2¹ = 1996903 is a prime.

It is a super-3 number, since 3×1996905³ = 23888752333508752875, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1996901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10360 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (108864).

2^1996905 is an apocalyptic number.

1996905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1996905 is a deficient number, since it is larger than the sum of its proper divisors (1486743).

1996905 is a wasteful number, since it uses less digits than its factorization.

1996905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 1996905 is about 1413.1188909642. The cubic root of 1996905 is about 125.9270805087.

The spelling of 1996905 in words is "one million, nine hundred ninety-six thousand, nine hundred five".