87876389 has 2 divisors, whose sum is σ = 87876390. Its totient is φ = 87876388.

The previous prime is 87876377. The next prime is 87876401. The reversal of 87876389 is 98367878.

It is a balanced prime because it is at equal distance from previous prime (87876377) and next prime (87876401).

It can be written as a sum of positive squares in only one way, i.e., 68145025 + 19731364 = 8255^2 + 4442^2 .

It is a cyclic number.

It is not a de Polignac number, because 87876389 - 2¹² = 87872293 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87876359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43938194 + 43938195.

It is an arithmetic number, because the mean of its divisors is an integer number (43938195).

Almost surely, 2^87876389 is an apocalyptic number.

It is an amenable number.

87876389 is a deficient number, since it is larger than the sum of its proper divisors (1).

87876389 is an equidigital number, since it uses as much as digits as its factorization.

87876389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 87876389 is about 9374.2407159193. The cubic root of 87876389 is about 444.5876565820.

The spelling of 87876389 in words is "eighty-seven million, eight hundred seventy-six thousand, three hundred eighty-nine".