87705144797 has 2 divisors, whose sum is σ = 87705144798. Its totient is φ = 87705144796.

The previous prime is 87705144739. The next prime is 87705144929. The reversal of 87705144797 is 79744150778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79301939236 + 8403205561 = 281606^2 + 91669^2 .

It is a cyclic number.

It is not a de Polignac number, because 87705144797 - 2²⁴ = 87688367581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87705144707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43852572398 + 43852572399.

It is an arithmetic number, because the mean of its divisors is an integer number (43852572399).

Almost surely, 2^87705144797 is an apocalyptic number.

It is an amenable number.

87705144797 is a deficient number, since it is larger than the sum of its proper divisors (1).

87705144797 is an equidigital number, since it uses as much as digits as its factorization.

87705144797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13829760, while the sum is 59.

The spelling of 87705144797 in words is "eighty-seven billion, seven hundred five million, one hundred forty-four thousand, seven hundred ninety-seven".