1939963 has 4 divisors (see below), whose sum is σ = 1948320. Its totient is φ = 1931608.

The previous prime is 1939961. The next prime is 1939967. The reversal of 1939963 is 3699391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3699391 = 157 ⋅23563.

It is a cyclic number.

It is not a de Polignac number, because 1939963 - 2¹ = 1939961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1939961) 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, 3820 + ... + 4297.

It is an arithmetic number, because the mean of its divisors is an integer number (487080).

2^1939963 is an apocalyptic number.

1939963 is a deficient number, since it is larger than the sum of its proper divisors (8357).

1939963 is an equidigital number, since it uses as much as digits as its factorization.

1939963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356.

The product of its digits is 39366, while the sum is 40.

The square root of 1939963 is about 1392.8255454291. The cubic root of 1939963 is about 124.7185775534.

The spelling of 1939963 in words is "one million, nine hundred thirty-nine thousand, nine hundred sixty-three".