87894281 has 2 divisors, whose sum is σ = 87894282. Its totient is φ = 87894280.

The previous prime is 87894241. The next prime is 87894307. The reversal of 87894281 is 18249878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87254281 + 640000 = 9341^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 87894281 - 2⁶ = 87894217 is a prime.

It is a super-2 number, since 2×87894281² = 15450809265013922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87894241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43947140 + 43947141.

It is an arithmetic number, because the mean of its divisors is an integer number (43947141).

Almost surely, 2^87894281 is an apocalyptic number.

It is an amenable number.

87894281 is a deficient number, since it is larger than the sum of its proper divisors (1).

87894281 is an equidigital number, since it uses as much as digits as its factorization.

87894281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 47.

The square root of 87894281 is about 9375.1949846390. The cubic root of 87894281 is about 444.6178278359.

It can be divided in two parts, 878 and 94281, that added together give a palindrome (95159).

The spelling of 87894281 in words is "eighty-seven million, eight hundred ninety-four thousand, two hundred eighty-one".