87813517111 has 2 divisors, whose sum is σ = 87813517112. Its totient is φ = 87813517110.

The previous prime is 87813517087. The next prime is 87813517133. The reversal of 87813517111 is 11171531878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87813517111 - 2⁵ = 87813517079 is a prime.

It is a super-2 number, since 2×87813517111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87813517411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43906758555 + 43906758556.

It is an arithmetic number, because the mean of its divisors is an integer number (43906758556).

Almost surely, 2^87813517111 is an apocalyptic number.

87813517111 is a deficient number, since it is larger than the sum of its proper divisors (1).

87813517111 is an equidigital number, since it uses as much as digits as its factorization.

87813517111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 43.

The spelling of 87813517111 in words is "eighty-seven billion, eight hundred thirteen million, five hundred seventeen thousand, one hundred eleven".