1879965 has 12 divisors (see below), whose sum is σ = 3258684. Its totient is φ = 1002624.

The previous prime is 1879961. The next prime is 1879967. The reversal of 1879965 is 5699781.

It can be written as a sum of positive squares in 2 ways, for example, as 700569 + 1179396 = 837^2 + 1086^2 .

It is not a de Polignac number, because 1879965 - 2² = 1879961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 41777 = 1879965 / (1 + 8 + 7 + 9 + 9 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1879965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1879961) 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, 20844 + ... + 20933.

It is an arithmetic number, because the mean of its divisors is an integer number (271557).

2^1879965 is an apocalyptic number.

1879965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1879965 is a deficient number, since it is larger than the sum of its proper divisors (1378719).

1879965 is a wasteful number, since it uses less digits than its factorization.

1879965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41788 (or 41785 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1879965 is about 1371.1181568340. The cubic root of 1879965 is about 123.4193499458.

The spelling of 1879965 in words is "one million, eight hundred seventy-nine thousand, nine hundred sixty-five".