87601289 has 4 divisors (see below), whose sum is σ = 92754324. Its totient is φ = 82448256.

The previous prime is 87601249. The next prime is 87601301. The reversal of 87601289 is 98210678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98210678 = 2 ⋅49105339.

It can be written as a sum of positive squares in 2 ways, for example, as 65885689 + 21715600 = 8117^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 87601289 - 2¹⁶ = 87535753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87601219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576492 + ... + 2576525.

It is an arithmetic number, because the mean of its divisors is an integer number (23188581).

Almost surely, 2^87601289 is an apocalyptic number.

It is an amenable number.

87601289 is a deficient number, since it is larger than the sum of its proper divisors (5153035).

87601289 is a wasteful number, since it uses less digits than its factorization.

87601289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153034.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 87601289 is about 9359.5560257952. The cubic root of 87601289 is about 444.1232394012.

The spelling of 87601289 in words is "eighty-seven million, six hundred one thousand, two hundred eighty-nine".