111797231587 has 2 divisors, whose sum is σ = 111797231588. Its totient is φ = 111797231586.

The previous prime is 111797231573. The next prime is 111797231639. The reversal of 111797231587 is 785132797111.

It is an a-pointer prime, because the next prime (111797231639) can be obtained adding 111797231587 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111797231587 - 2¹⁹ = 111796707299 is a prime.

It is not a weakly prime, because it can be changed into another prime (111797231527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55898615793 + 55898615794.

It is an arithmetic number, because the mean of its divisors is an integer number (55898615794).

Almost surely, 2^111797231587 is an apocalyptic number.

111797231587 is a deficient number, since it is larger than the sum of its proper divisors (1).

111797231587 is an equidigital number, since it uses as much as digits as its factorization.

111797231587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 52.

The spelling of 111797231587 in words is "one hundred eleven billion, seven hundred ninety-seven million, two hundred thirty-one thousand, five hundred eighty-seven".