87840100712437 has 2 divisors, whose sum is σ = 87840100712438. Its totient is φ = 87840100712436.

The previous prime is 87840100712401. The next prime is 87840100712471. The reversal of 87840100712437 is 73421700104878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87548377579441 + 291723132996 = 9356729^2 + 540114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87840100712437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87840100712477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43920050356218 + 43920050356219.

It is an arithmetic number, because the mean of its divisors is an integer number (43920050356219).

Almost surely, 2^{87840100712437} is an apocalyptic number.

It is an amenable number.

87840100712437 is a deficient number, since it is larger than the sum of its proper divisors (1).

87840100712437 is an equidigital number, since it uses as much as digits as its factorization.

87840100712437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The spelling of 87840100712437 in words is "eighty-seven trillion, eight hundred forty billion, one hundred million, seven hundred twelve thousand, four hundred thirty-seven".