1118977819 has 2 divisors, whose sum is σ = 1118977820. Its totient is φ = 1118977818.

The previous prime is 1118977813. The next prime is 1118977837. The reversal of 1118977819 is 9187798111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9187798111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1118977819 - 2¹¹ = 1118975771 is a prime.

It is a super-2 number, since 2×1118977819² = 2504222718827993522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1118977813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559488909 + 559488910.

It is an arithmetic number, because the mean of its divisors is an integer number (559488910).

Almost surely, 2^1118977819 is an apocalyptic number.

1118977819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118977819 is an equidigital number, since it uses as much as digits as its factorization.

1118977819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 52.

The square root of 1118977819 is about 33451.1258255982. The cubic root of 1118977819 is about 1038.1827915408.

It can be divided in two parts, 111897 and 7819, that added together give a square (119716 = 346²).

The spelling of 1118977819 in words is "one billion, one hundred eighteen million, nine hundred seventy-seven thousand, eight hundred nineteen".