1979895 has 16 divisors (see below), whose sum is σ = 3335040. Its totient is φ = 1000224.

The previous prime is 1979893. The next prime is 1979897. The reversal of 1979895 is 5989791.

It is an interprime number because it is at equal distance from previous prime (1979893) and next prime (1979897).

It is not a de Polignac number, because 1979895 - 2¹ = 1979893 is a prime.

It is a super-2 number, since 2×1979895² = 7839968422050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979891) 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, 3189 + ... + 3758.

It is an arithmetic number, because the mean of its divisors is an integer number (208440).

2^1979895 is an apocalyptic number.

1979895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1979895 is a deficient number, since it is larger than the sum of its proper divisors (1355145).

1979895 is a wasteful number, since it uses less digits than its factorization.

1979895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974.

The product of its digits is 204120, while the sum is 48.

The square root of 1979895 is about 1407.0874173270. The cubic root of 1979895 is about 125.5685038406.

The spelling of 1979895 in words is "one million, nine hundred seventy-nine thousand, eight hundred ninety-five".