87851111 has 2 divisors, whose sum is σ = 87851112. Its totient is φ = 87851110.

The previous prime is 87851039. The next prime is 87851119. The reversal of 87851111 is 11115878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87851111 - 2¹⁸ = 87588967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87851119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43925555 + 43925556.

It is an arithmetic number, because the mean of its divisors is an integer number (43925556).

Almost surely, 2^87851111 is an apocalyptic number.

87851111 is a deficient number, since it is larger than the sum of its proper divisors (1).

87851111 is an equidigital number, since it uses as much as digits as its factorization.

87851111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 32.

The square root of 87851111 is about 9372.8923497499. The cubic root of 87851111 is about 444.5450233458.

Adding to 87851111 its reverse (11115878), we get a palindrome (98966989).

The spelling of 87851111 in words is "eighty-seven million, eight hundred fifty-one thousand, one hundred eleven".