1111238197 has 2 divisors, whose sum is σ = 1111238198. Its totient is φ = 1111238196.

The previous prime is 1111238173. The next prime is 1111238209. The reversal of 1111238197 is 7918321111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030795236 + 80442961 = 32106^2 + 8969^2 .

It is an emirp because it is prime and its reverse (7918321111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111238197 - 2¹⁵ = 1111205429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111238137) 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 as a sum of consecutive naturals, namely, 555619098 + 555619099.

It is an arithmetic number, because the mean of its divisors is an integer number (555619099).

Almost surely, 2^1111238197 is an apocalyptic number.

It is an amenable number.

1111238197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111238197 is an equidigital number, since it uses as much as digits as its factorization.

1111238197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 34.

The square root of 1111238197 is about 33335.2395671608. The cubic root of 1111238197 is about 1035.7836556864.

The spelling of 1111238197 in words is "one billion, one hundred eleven million, two hundred thirty-eight thousand, one hundred ninety-seven".