1915963 has 4 divisors (see below), whose sum is σ = 2189680. Its totient is φ = 1642248.

The previous prime is 1915961. The next prime is 1915981. The reversal of 1915963 is 3695191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3695191 = 89 ⋅41519.

It is a cyclic number.

It is not a de Polignac number, because 1915963 - 2¹ = 1915961 is a prime.

It is a Duffinian number.

1915963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1915961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136848 + ... + 136861.

It is an arithmetic number, because the mean of its divisors is an integer number (547420).

2^1915963 is an apocalyptic number.

1915963 is a deficient number, since it is larger than the sum of its proper divisors (273717).

1915963 is an equidigital number, since it uses as much as digits as its factorization.

1915963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273716.

The product of its digits is 7290, while the sum is 34.

The square root of 1915963 is about 1384.1831526211. The cubic root of 1915963 is about 124.2021287137.

The spelling of 1915963 in words is "one million, nine hundred fifteen thousand, nine hundred sixty-three".