1931966 has 4 divisors (see below), whose sum is σ = 2897952. Its totient is φ = 965982.

The previous prime is 1931957. The next prime is 1931983. The reversal of 1931966 is 6691391.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 482990 + ... + 482993.

It is an arithmetic number, because the mean of its divisors is an integer number (724488).

2^1931966 is an apocalyptic number.

1931966 is a deficient number, since it is larger than the sum of its proper divisors (965986).

1931966 is an equidigital number, since it uses as much as digits as its factorization.

1931966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965985.

The product of its digits is 8748, while the sum is 35.

The square root of 1931966 is about 1389.9517977254. The cubic root of 1931966 is about 124.5469680802.

It can be divided in two parts, 1931 and 966, that multiplied together give a triangular number (1865346 = T₁₉₃₁).

The spelling of 1931966 in words is "one million, nine hundred thirty-one thousand, nine hundred sixty-six".