87034639729 has 2 divisors, whose sum is σ = 87034639730. Its totient is φ = 87034639728.

The previous prime is 87034639723. The next prime is 87034639777. The reversal of 87034639729 is 92793643078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44207165025 + 42827474704 = 210255^2 + 206948^2 .

It is a cyclic number.

It is not a de Polignac number, because 87034639729 - 2¹⁷ = 87034508657 is a prime.

It is not a weakly prime, because it can be changed into another prime (87034639723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43517319864 + 43517319865.

It is an arithmetic number, because the mean of its divisors is an integer number (43517319865).

Almost surely, 2^87034639729 is an apocalyptic number.

It is an amenable number.

87034639729 is a deficient number, since it is larger than the sum of its proper divisors (1).

87034639729 is an equidigital number, since it uses as much as digits as its factorization.

87034639729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 58.

The spelling of 87034639729 in words is "eighty-seven billion, thirty-four million, six hundred thirty-nine thousand, seven hundred twenty-nine".