1967961 has 4 divisors (see below), whose sum is σ = 2623952. Its totient is φ = 1311972.

The previous prime is 1967947. The next prime is 1968017. The reversal of 1967961 is 1697691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1967961 - 2⁶ = 1967897 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1967261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327991 + ... + 327996.

It is an arithmetic number, because the mean of its divisors is an integer number (655988).

2^1967961 is an apocalyptic number.

It is an amenable number.

1967961 is a deficient number, since it is larger than the sum of its proper divisors (655991).

1967961 is an equidigital number, since it uses as much as digits as its factorization.

1967961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655990.

The product of its digits is 20412, while the sum is 39.

The square root of 1967961 is about 1402.8403330387. The cubic root of 1967961 is about 125.3157033134.

The spelling of 1967961 in words is "one million, nine hundred sixty-seven thousand, nine hundred sixty-one".