1147819 has 2 divisors, whose sum is σ = 1147820. Its totient is φ = 1147818.

The previous prime is 1147793. The next prime is 1147841. The reversal of 1147819 is 9187411.

It is a strong prime.

It is an emirp because it is prime and its reverse (9187411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1147819 - 2¹⁹ = 623531 is a prime.

It is a super-4 number, since 4×1147819⁴ (a number of 25 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

1147819 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1147889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573909 + 573910.

It is an arithmetic number, because the mean of its divisors is an integer number (573910).

2^1147819 is an apocalyptic number.

1147819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147819 is an equidigital number, since it uses as much as digits as its factorization.

1147819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 1147819 is about 1071.3631503837. The cubic root of 1147819 is about 104.7026812023.

The spelling of 1147819 in words is "one million, one hundred forty-seven thousand, eight hundred nineteen".