1961879 has 4 divisors (see below), whose sum is σ = 2029560. Its totient is φ = 1894200.

The previous prime is 1961873. The next prime is 1961887. The reversal of 1961879 is 9781691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9781691 = 167 ⋅58573.

It is a cyclic number.

It is not a de Polignac number, because 1961879 - 2⁴ = 1961863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33797 + ... + 33854.

It is an arithmetic number, because the mean of its divisors is an integer number (507390).

2^1961879 is an apocalyptic number.

1961879 is a deficient number, since it is larger than the sum of its proper divisors (67681).

1961879 is an equidigital number, since it uses as much as digits as its factorization.

1961879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67680.

The product of its digits is 27216, while the sum is 41.

The square root of 1961879 is about 1400.6709106710. The cubic root of 1961879 is about 125.1864736822.

The spelling of 1961879 in words is "one million, nine hundred sixty-one thousand, eight hundred seventy-nine".