86997707749 has 2 divisors, whose sum is σ = 86997707750. Its totient is φ = 86997707748.

The previous prime is 86997707711. The next prime is 86997707761. The reversal of 86997707749 is 94770779968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57480062500 + 29517645249 = 239750^2 + 171807^2 .

It is a cyclic number.

It is not a de Polignac number, because 86997707749 - 2²⁵ = 86964153317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86997717749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43498853874 + 43498853875.

It is an arithmetic number, because the mean of its divisors is an integer number (43498853875).

Almost surely, 2^86997707749 is an apocalyptic number.

It is an amenable number.

86997707749 is a deficient number, since it is larger than the sum of its proper divisors (1).

86997707749 is an equidigital number, since it uses as much as digits as its factorization.

86997707749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336063168, while the sum is 73.

The spelling of 86997707749 in words is "eighty-six billion, nine hundred ninety-seven million, seven hundred seven thousand, seven hundred forty-nine".