87471911 has 2 divisors, whose sum is σ = 87471912. Its totient is φ = 87471910.

The previous prime is 87471899. The next prime is 87471931. The reversal of 87471911 is 11917478.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87471911 - 2²⁶ = 20363047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87471931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43735955 + 43735956.

It is an arithmetic number, because the mean of its divisors is an integer number (43735956).

Almost surely, 2^87471911 is an apocalyptic number.

87471911 is a deficient number, since it is larger than the sum of its proper divisors (1).

87471911 is an equidigital number, since it uses as much as digits as its factorization.

87471911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 38.

The square root of 87471911 is about 9352.6419262153. The cubic root of 87471911 is about 443.9044903861.

The spelling of 87471911 in words is "eighty-seven million, four hundred seventy-one thousand, nine hundred eleven".