11858974397 has 2 divisors, whose sum is σ = 11858974398. Its totient is φ = 11858974396.

The previous prime is 11858974373. The next prime is 11858974403. The reversal of 11858974397 is 79347985811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6937390681 + 4921583716 = 83291^2 + 70154^2 .

It is an emirp because it is prime and its reverse (79347985811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11858974397 - 2²⁴ = 11842197181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11858974307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5929487198 + 5929487199.

It is an arithmetic number, because the mean of its divisors is an integer number (5929487199).

Almost surely, 2^11858974397 is an apocalyptic number.

It is an amenable number.

11858974397 is a deficient number, since it is larger than the sum of its proper divisors (1).

11858974397 is an equidigital number, since it uses as much as digits as its factorization.

11858974397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 62.

The spelling of 11858974397 in words is "eleven billion, eight hundred fifty-eight million, nine hundred seventy-four thousand, three hundred ninety-seven".