87870481 has 2 divisors, whose sum is σ = 87870482. Its totient is φ = 87870480.

The previous prime is 87870479. The next prime is 87870487. The reversal of 87870481 is 18407878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 26780625 = 7816^2 + 5175^2 .

It is a cyclic number.

It is not a de Polignac number, because 87870481 - 2¹ = 87870479 is a prime.

It is a super-2 number, since 2×87870481² = 15442442862342722, which contains 22 as substring.

Together with 87870479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87870487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43935240 + 43935241.

It is an arithmetic number, because the mean of its divisors is an integer number (43935241).

Almost surely, 2^87870481 is an apocalyptic number.

It is an amenable number.

87870481 is a deficient number, since it is larger than the sum of its proper divisors (1).

87870481 is an equidigital number, since it uses as much as digits as its factorization.

87870481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 87870481 is about 9373.9255917678. The cubic root of 87870481 is about 444.5776930306.

The spelling of 87870481 in words is "eighty-seven million, eight hundred seventy thousand, four hundred eighty-one".