87654356729 has 2 divisors, whose sum is σ = 87654356730. Its totient is φ = 87654356728.

The previous prime is 87654356653. The next prime is 87654356731. The reversal of 87654356729 is 92765345678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44907967225 + 42746389504 = 211915^2 + 206752^2 .

It is a cyclic number.

It is not a de Polignac number, because 87654356729 - 2¹² = 87654352633 is a prime.

Together with 87654356731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87654356789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43827178364 + 43827178365.

It is an arithmetic number, because the mean of its divisors is an integer number (43827178365).

Almost surely, 2^87654356729 is an apocalyptic number.

It is an amenable number.

87654356729 is a deficient number, since it is larger than the sum of its proper divisors (1).

87654356729 is an equidigital number, since it uses as much as digits as its factorization.

87654356729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 62.

The spelling of 87654356729 in words is "eighty-seven billion, six hundred fifty-four million, three hundred fifty-six thousand, seven hundred twenty-nine".