87297986139997 has 2 divisors, whose sum is σ = 87297986139998. Its totient is φ = 87297986139996.

The previous prime is 87297986139989. The next prime is 87297986140051. The reversal of 87297986139997 is 79993168979278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61334130855321 + 25963855284676 = 7831611^2 + 5095474^2 .

It is a cyclic number.

It is not a de Polignac number, because 87297986139997 - 2³ = 87297986139989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87297986139977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43648993069998 + 43648993069999.

It is an arithmetic number, because the mean of its divisors is an integer number (43648993069999).

Almost surely, 2^{87297986139997} is an apocalyptic number.

It is an amenable number.

87297986139997 is a deficient number, since it is larger than the sum of its proper divisors (1).

87297986139997 is an equidigital number, since it uses as much as digits as its factorization.

87297986139997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46664771328, while the sum is 94.

The spelling of 87297986139997 in words is "eighty-seven trillion, two hundred ninety-seven billion, nine hundred eighty-six million, one hundred thirty-nine thousand, nine hundred ninety-seven".