1995931 has 16 divisors (see below), whose sum is σ = 2464000. Its totient is φ = 1578528.

The previous prime is 1995913. The next prime is 1995937. The reversal of 1995931 is 1395991.

It is not a de Polignac number, because 1995931 - 2¹⁷ = 1864859 is a prime.

It is a super-2 number, since 2×1995931² = 7967481113522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1995937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5545 + ... + 5893.

It is an arithmetic number, because the mean of its divisors is an integer number (154000).

2^1995931 is an apocalyptic number.

1995931 is a deficient number, since it is larger than the sum of its proper divisors (468069).

1995931 is a wasteful number, since it uses less digits than its factorization.

1995931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418.

The product of its digits is 10935, while the sum is 37.

The square root of 1995931 is about 1412.7742211691. The cubic root of 1995931 is about 125.9066033330.

It can be divided in two parts, 1995 and 931, that added together give a triangular number (2926 = T₇₆).

The spelling of 1995931 in words is "one million, nine hundred ninety-five thousand, nine hundred thirty-one".