87561874093 has 2 divisors, whose sum is σ = 87561874094. Its totient is φ = 87561874092.

The previous prime is 87561874063. The next prime is 87561874139. The reversal of 87561874093 is 39047816578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82505668644 + 5056205449 = 287238^2 + 71107^2 .

It is a cyclic number.

It is not a de Polignac number, because 87561874093 - 2¹³ = 87561865901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87561874003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43780937046 + 43780937047.

It is an arithmetic number, because the mean of its divisors is an integer number (43780937047).

Almost surely, 2^87561874093 is an apocalyptic number.

It is an amenable number.

87561874093 is a deficient number, since it is larger than the sum of its proper divisors (1).

87561874093 is an equidigital number, since it uses as much as digits as its factorization.

87561874093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 87561874093 in words is "eighty-seven billion, five hundred sixty-one million, eight hundred seventy-four thousand, ninety-three".