87869689 has 2 divisors, whose sum is σ = 87869690. Its totient is φ = 87869688.

The previous prime is 87869669. The next prime is 87869701. The reversal of 87869689 is 98696878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 166464 = 9365^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 87869689 - 2¹¹ = 87867641 is a prime.

It is not a weakly prime, because it can be changed into another prime (87869669) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43934844 + 43934845.

It is an arithmetic number, because the mean of its divisors is an integer number (43934845).

Almost surely, 2^87869689 is an apocalyptic number.

It is an amenable number.

87869689 is a deficient number, since it is larger than the sum of its proper divisors (1).

87869689 is an equidigital number, since it uses as much as digits as its factorization.

87869689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 61.

The square root of 87869689 is about 9373.8833468312. The cubic root of 87869689 is about 444.5763573277.

The spelling of 87869689 in words is "eighty-seven million, eight hundred sixty-nine thousand, six hundred eighty-nine".