1187963 has 4 divisors (see below), whose sum is σ = 1357680. Its totient is φ = 1018248.

The previous prime is 1187947. The next prime is 1187981. The reversal of 1187963 is 3697811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3697811 = 13 ⋅284447.

It is not a de Polignac number, because 1187963 - 2⁴ = 1187947 is a prime.

It is a super-2 number, since 2×1187963² = 2822512178738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187933) 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, 84848 + ... + 84861.

It is an arithmetic number, because the mean of its divisors is an integer number (339420).

2^1187963 is an apocalyptic number.

1187963 is a deficient number, since it is larger than the sum of its proper divisors (169717).

1187963 is an equidigital number, since it uses as much as digits as its factorization.

1187963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169716.

The product of its digits is 9072, while the sum is 35.

The square root of 1187963 is about 1089.9371541516. The cubic root of 1187963 is about 105.9093505291.

The spelling of 1187963 in words is "one million, one hundred eighty-seven thousand, nine hundred sixty-three".