87226820137 has 2 divisors, whose sum is σ = 87226820138. Its totient is φ = 87226820136.

The previous prime is 87226820101. The next prime is 87226820141. The reversal of 87226820137 is 73102862278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87211539856 + 15280281 = 295316^2 + 3909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87226820137 is a prime.

It is not a weakly prime, because it can be changed into another prime (87226820147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43613410068 + 43613410069.

It is an arithmetic number, because the mean of its divisors is an integer number (43613410069).

Almost surely, 2^87226820137 is an apocalyptic number.

It is an amenable number.

87226820137 is a deficient number, since it is larger than the sum of its proper divisors (1).

87226820137 is an equidigital number, since it uses as much as digits as its factorization.

87226820137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 87226820137 in words is "eighty-seven billion, two hundred twenty-six million, eight hundred twenty thousand, one hundred thirty-seven".