111797231639 has 2 divisors, whose sum is σ = 111797231640. Its totient is φ = 111797231638.

The previous prime is 111797231587. The next prime is 111797231657. The reversal of 111797231639 is 936132797111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111797231639 - 2²⁰ = 111796183063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111797237639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55898615819 + 55898615820.

It is an arithmetic number, because the mean of its divisors is an integer number (55898615820).

Almost surely, 2^111797231639 is an apocalyptic number.

111797231639 is a deficient number, since it is larger than the sum of its proper divisors (1).

111797231639 is an equidigital number, since it uses as much as digits as its factorization.

111797231639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 50.

The spelling of 111797231639 in words is "one hundred eleven billion, seven hundred ninety-seven million, two hundred thirty-one thousand, six hundred thirty-nine".