1181923 has 2 divisors, whose sum is σ = 1181924. Its totient is φ = 1181922.

The previous prime is 1181911. The next prime is 1181927. The reversal of 1181923 is 3291811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1181923 - 2¹⁷ = 1050851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1181927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590961 + 590962.

It is an arithmetic number, because the mean of its divisors is an integer number (590962).

2^1181923 is an apocalyptic number.

1181923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181923 is an equidigital number, since it uses as much as digits as its factorization.

1181923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 1181923 is about 1087.1628212922. The cubic root of 1181923 is about 105.7295526492.

It can be divided in two parts, 11 and 81923, that multiplied together give a triangular number (901153 = T₁₃₄₂).

The spelling of 1181923 in words is "one million, one hundred eighty-one thousand, nine hundred twenty-three".