87045689 has 2 divisors, whose sum is σ = 87045690. Its totient is φ = 87045688.

The previous prime is 87045683. The next prime is 87045691. The reversal of 87045689 is 98654078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65885689 + 21160000 = 8117^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 87045689 - 2⁸ = 87045433 is a prime.

Together with 87045691, 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 (87045683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43522844 + 43522845.

It is an arithmetic number, because the mean of its divisors is an integer number (43522845).

Almost surely, 2^87045689 is an apocalyptic number.

It is an amenable number.

87045689 is a deficient number, since it is larger than the sum of its proper divisors (1).

87045689 is an equidigital number, since it uses as much as digits as its factorization.

87045689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 87045689 is about 9329.8279190990. The cubic root of 87045689 is about 443.1823156964.

The spelling of 87045689 in words is "eighty-seven million, forty-five thousand, six hundred eighty-nine".