87089489293 has 2 divisors, whose sum is σ = 87089489294. Its totient is φ = 87089489292.

The previous prime is 87089489269. The next prime is 87089489309. The reversal of 87089489293 is 39298498078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49018845604 + 38070643689 = 221402^2 + 195117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87089489293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87089489233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43544744646 + 43544744647.

It is an arithmetic number, because the mean of its divisors is an integer number (43544744647).

Almost surely, 2^87089489293 is an apocalyptic number.

It is an amenable number.

87089489293 is a deficient number, since it is larger than the sum of its proper divisors (1).

87089489293 is an equidigital number, since it uses as much as digits as its factorization.

87089489293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 87089489293 in words is "eighty-seven billion, eighty-nine million, four hundred eighty-nine thousand, two hundred ninety-three".