87854714221 has 2 divisors, whose sum is σ = 87854714222. Its totient is φ = 87854714220.

The previous prime is 87854714153. The next prime is 87854714231. The reversal of 87854714221 is 12241745878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45257882121 + 42596832100 = 212739^2 + 206390^2 .

It is a cyclic number.

It is not a de Polignac number, because 87854714221 - 2⁷ = 87854714093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87854714231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43927357110 + 43927357111.

It is an arithmetic number, because the mean of its divisors is an integer number (43927357111).

Almost surely, 2^87854714221 is an apocalyptic number.

It is an amenable number.

87854714221 is a deficient number, since it is larger than the sum of its proper divisors (1).

87854714221 is an equidigital number, since it uses as much as digits as its factorization.

87854714221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1003520, while the sum is 49.

The spelling of 87854714221 in words is "eighty-seven billion, eight hundred fifty-four million, seven hundred fourteen thousand, two hundred twenty-one".